Thursday, November 7, 2013

What can Jay-Z teach us about application analytics?

If you want to move your audience, then a whole lot actually…

The gold standard for analytics is “actionable insight;” how much smarter, faster, or efficient do we become when the right people get the right information in the right format at the right time?

General purpose analytics solutions are typically built to ingest anything and everything. “Adapters” translate data sources into a common (proprietary) analytics framework – and then the slicing and dicing begins! While obviously flexible, this approach only works if users have a safe and reliable means to collect (and deliver) raw data into their systems; with application analytics, this is rarely the case. 

Recording applications “in the wild” is not an easy or simple task. In addition to the functional requirements to capture the right kinds of runtime telemetry, application instrumentation must meet a host of performance, privacy, quality, and security requirements as well – requirements that vary wildly by industry, use case, and target audience. …and, the demand for high fidelity application analytics has never been greater; you can thank the adoption of feedback driven-development practices coupled with the operational complexity of mobile and cloud computing plus the ever-evolving concerns around privacy and security for that.

So what’s a development team to do? Well, it turns out that there’s nothing new about having to record complex real-world events and then package them up to inspire and move audiences – media moguls and hit makers have been doing all along!

Developers, if you know you should be including analytics inside your application development process, I recommend that you take a page from the recording industry – it turns out they know a little something about the complexities of capturing user behavior across heterogeneous devices and in diverse settings (the only big difference is that they call their users “musicians”).

I've taken the liberty of condensing a post from a site dedicated to teaching the art and business of audio production and mapping it to the patterns and practices of effective application analytics implementation. You can see the original post at the recording process if you want to check my work.

The infograph below maps each step in "the recording process" to its app analytics analog. I've underlined key points in the original post and added my own take-away.

People will tell you that new technology changes everything – for me, this is just one more concrete example proving just the opposite.

Monday, September 16, 2013

Mobile development takes root; application analytics go mainstream

We’ve just finished up another survey tapping ~8,000 developers; mostly (although definitely not exclusively) of the .NET variety – and I think there’s little room for doubt; the rise of mobile and modern apps is having a profound impact on the way developers work and the tools they use.

What a difference a year makes

We did a similar survey in September 2012 (Who cares about application analytics? Lots of people for lots of reasons) and, even then, the interest in analytics was obvious – but interest had not yet translated into action. 

In Sept of 2012, we reported that 77% of development and their management had identified “insight into production application usage” as influential, important or essential to their work, and 71% identified “near real-time notification of unhandled, caught, and/or thrown exceptions” in the same way.

…BUT, at the same time, only 30% indicated that they were doing any kind of analytics in practice (exception reporting, feature tracking, etc.).
“More people believe that the world is flat than doubt the positive role of application analytics on development.”
Today, that 77% and 71% of developers who “got the value of analytics” is now a solid 100% and 99.5% respectively (for those that don’t do surveys, you have to appreciate that a 100% opinion is virtually impossible to find – you’d have a hard time getting a 100% consensus on the shape of the planet (round or flat) or even the role that aliens play in picking Super Bowl winners (are they pro AFC or pro NFC?).

Even more impressive is the rise of actual use of analytics. The 30% of development teams that claimed to use some sort of analytics has, in just one year, ballooned to 62%.

The rise of mobile development

Mobile devices have unique capabilities (accelerometer, augmented reality, gyroscope, camera/scanner, gesture recognition, GPS and navigation…) that drive unique development requirements which, in turn, spawn new development patterns and practices – and one of the most notable (in my opinion anyway) is the expectation that some form of application analytics always be included.

This is worth saying again; in traditional PC apps, adding analytics is the exception, not the rule – in mobile apps, the situation is reversed; embedding analytics is the norm.  

This is the other major shift in our year-over-year survey results. In 2012, only 25% of the development teams reported that they were developing mobile apps (iOS, Android, …) – in 2013, that number has more than doubled to 56%. Is it a coincidence that the rise of analytics use is proportionate to the rise in mobile development?

Analytics go mainstream

For analytics to “go mainstream,” mobile analytics development patterns need to be applied (and adapted) beyond narrow consumer-centric scenarios (as lucrative as those scenarios may be) to include line-of-business and “enterprise” apps (with all of the attendant infrastructure, IT governance, and data integration requirements that this implies).  …and we’re seeing evidence of this too.

94% of respondents are building mobile apps targeting consumers, BUT 40% are also deploying apps “used by employees” to “support a larger business,” e.g. enterprise apps!

65% of enterprise mobile app dev teams (essentially the same percentage as their consumer-centric counterparts) also report using (some form) of analytics.

Analytics: one size fits all?

Of course not – the specialization of application analytics technologies is another inevitable outcome of all of this change – and developers are on the front-lines trying to figure all of this out.

The following chart lists the analytics technologies our respondents have reported using – Google’s (and to a lesser degree, Flurry’s) prominence should come as no surprise. …but what’s the deal with the homegrown category?

Developers "doing it themselves" would strongly suggest that the reigning champions of consumer-centered mobile analytics are failing to meet a growing set of analytics requirements.

Is it a coincidence that the homegrown and PreEmptive analytics adoption rates map so closely to  the enterprise mobile app market share listed above? (40%)

These tools, they are a-changing

Analytics is not the only development tool category undergoing change and reinvention. When asked to enter specialized mobile development tools, responses included both “the familiar” and “the brand new.” (Note, this was not a multiple choice – this was an open text box where anything – or nothing – could be entered)

The familiar: Visual Studio was cited as a “specialized toolset” by 24.6% of those listing at least one specialized mobile app development tool – of the 49 unique tools that were cited, this was the #1 response – and should give the Visual Studio product team some satisfaction as they are clearly establishing Visual Studio as something more than just a .NET-centric dev environment.

The brand new: Xamarin, the cross platform mobile app development platform, was the most common new – and/or truly mobile-specific – toolset (they released a major refresh of their solution in 2013). Xamarin was cited by 9.5% of those listing at least one specialized mobile app development tool. 

(Are you using Xamarin? Contact me if you’d like to learn more about our soon to be released analytics integration with Xamarin – or visit the PreEmptive website if you’re reading this during or after Q4/2013)

The complete list of tools mentioned at least once include:

While Visual Studio was cited most often, relative newcomer, Xamarin, is already making its mark.

Game over? Are you kidding!? We haven’t even figured out the rules yet…

Have development organizations figured out how they’re going to tackle current and future mobile development requirements? (That, my friends, is what we call a rhetorical question)

The rise and assimilation of mobile devices is far, far from over and, sadly, I would suggest that picking new tools and expanding technical skillsets is the least of a development organizations’ worries – grappling with entirely new sets of operational, legal, social, security, and privacy obligations (that are themselves changing and often inconsistent) pose (in my view) the most serious risk (a.k.a. opportunity) for today’s development shop. 

…and those that lack a sense of urgency around these issues, that take the posture of waiting until these issues come to them, are in for a world of hurt.

For example, 

Personally Identifiable Information (PII)
  • 15% of respondents that collect personally identifiable information (PII) do not offer their users a way to opt-out 
  • 18% that collect PII do not offer a link to their privacy policy (there was only a 6% overlap between these two groups) 

To know that you’re collecting PII and to not provide these mechanisms is a serious omission (both from a development and an operations perspective) – and this is the easy stuff! This question also presumes that developers are using the most up-to-date and appropriate PII definition – a stretch to be sure.

Regulatory and Compliance

For those that indicated that their apps have “regulatory or compliance requirements” (29.9% of respondents) – their obligations are, by their very nature, more complex, ambiguous, and fluid.
  • 36.6% of respondents whose apps are subject to compliance and/or regulatory oversight do not offer their users a way to opt-out 
  • 16.7% of respondents whose apps are subject to compliance and/or regulatory oversight do not offer a link to their privacy policy.

…and what about collecting application usage information?
  • 41.7% of respondents whose apps are subject to compliance and/or regulatory oversight use Google Analytics or Flurry – analytics providers whose business model is predicated on harvesting and monetizing usage telemetry! 

Have these development organizations reconciled their regulatory obligations with Google’s and Flurry’s usage terms or privacy policies? 

In confusion, there’s opportunity

…and I think everyone can agree – mobile application development is full of opportunity.

Tuesday, September 10, 2013

(Zinfandel + BBQ = $$$) - I told you so

Back in February of 2011, I posted Riddle me this! Where can French, Italians, and Germans all agree? focusing on how a collection of early Windows Phone developers were leveraging analytics; the 10 apps included games, media apps, and a foodie app that paired food and wine by VinoMatch. In this last example, our analytics tracked user behaviors (which foods users chose) and which wines they selected during the pairing.
Analysis of food selection by users' nationality showing Italians' special interest in BBQ

I was surprised to learn a) Italian interest in pairing wine with BBQ and b) the implied potential to market Zinfandel to Italians as an American wine for BBQ (because Zinfandel was bred from a cheap table-variety Italian grape, Italians have typically been a hard sell).

So… imagine my surprise now in 2013, as I see a series of targeted marketing campaigns with exactly this message (from multiple wineries). I wonder how many hundreds of thousands of dollars in market research these guys spent when all they had to do was instrument an app?!
  Cin Cin!

Monday, September 9, 2013

Your phone can be a very scary place

Mobile apps are changing our social, cultural, and economic landscapes – and, with the many opportunities and perks that these changes promise, come an equally impressive collection of risks and potential exploits.

This post is probably way overdue – it’s an update (supplement really) to an article I wrote for The ISSA Journal on Assessing and Managing Security Risks Unique to Java and .NET way back in 09’. The article laid out reverse engineering and tampering risks stemming from the use of managed code (Java and .NET).  The technical issues were really secondary – what needed to be emphasized was the importance of having a consistent and rational framework to assess the materiality (relative danger) of those risks (piracy, IP theft, data engineering…).

In other words, the simple fact that it’s easy to reverse engineer and tamper with a piece of managed code does not automatically lead to a conclusion that a development team should make any moves to prevent that from happening. The degree of danger (risk) should be the only motivation (justification) to invest in preventative or detective measures; and, by implication, risk mitigation investments should be in proportion to those risks (low risk, low investment).

Here’s a graphic I used in 09’ to show the progression from managed apps (.NET and Java) to the risks that stem naturally from their use.
Risks stemming from the use of Java and .NET circa 2009

Managed code risks in the mobile world

Of course, managed code is also playing a central role in the rise of mobile computing as well as the ubiquitous “app marketplace,” e.g. Android and, to a lesser degree, Windows Phone and WindowsRT – and, as one might predict, these apps are introducing their own unique cross-section of potential risks and exploits. 

Here is an updated “hierarchy of risks” for today’s mobile world:
Risks stemming from the use of Java and .NET in today’s mobile world

The graphic above highlights risks that have either evolved or emerged within the mobile ecosystem – and these are probably best illustrated with real world incidents and trends (also highlighted below):

Earlier this year, a mobile development company documented how to turn one of the most popular paid Android apps (SwiftKey Keyboard) into a keylogger (something that captures everything you do and sends it somewhere else).  

This little example illustrates all of the risks listed above:
  • IP theft (this is a paid app that can now be side loaded for free)
  • Content theft (branding, documentation, etc. are stolen)
  • Counterfeiting (it is not a REAL SwiftKey instance – it’s a fake – more than a cracked instance)
  • Service theft (if the SwiftKey app makes any web service calls that the true developers must pay for – then these users are driving up cloud expenses – and if any of these users write-in for support, then human resources are being burned here too)
  • Data loss and privacy violations (obviously there is no “opt-in” to the keylogging and the passwords, etc. that are sent are clearly private data)
  • Piracy (users should be paying the licensing fee normally charged)
  • Malware (the keylogging is the malware in this case)
In this scenario, the “victim” would have needed to go looking for “free versions” of the app away from the sanctioned marketplace – but that’s not always the case.

Symantec recently reported finding counterfeit apps inside the Amazon Appstore (and Amazon has one of the most rigorous curating and analysis check-in processes). I, myself, have had my content stripped and look alike apps published across marketplaces too - see my earlier posts Hoisted by my own petard: or why my app is number two (for now) and Ryan is Lying – well, actually stealing, cheating and lying - again). 

Now these anecdotes are all too real, and sadly, they are also by no means unique. Trend Micro found that 1 in every 10 Android apps are malicious and that 22% of apps inappropriately leaked user data – that is crazy!

For a good overview of Android threats, checkout this free paper by Trend Micro, Android Under Siege: Popularity Comes at a Price).

To obfuscate (or not)?

As I’ve already written – you shouldn’t do anything simply to make reverse engineering and tampering more difficult – you should only take action if the associated risks are significant enough to you and said “steps” would reduce those risks to an acceptable level (your “appetite for risk.”)  

…but, seriously, who cares what I think? What do the owners of these platforms have to say?

Android “highly recommends” obfuscating all code and emphasizes this in a number of specific areas such as: “At a minimum, we recommend that you run an obfuscation tool” when developing billing logic. …and, they go so far as to include an open source obfuscator, Proguard – where again, Android “highly recommends” that all Android apps be obfuscated.

Microsoft also recommends that all modern apps be obfuscated (see Windows Phone policy) and they also offer a “community edition” obfuscator (our own Dotfuscator CE) as a part of Visual Studio. 

Tamper detection, exception monitoring, and usage profiling

Obfuscation “prevents” reverse engineering and tampering; but it does not actively detect when attackers are successful (and, with enough skill and time – all attackers can eventually succeed). Nor would obfuscation defend against attacks or include a notification mechanism – that’s what tamper defense, exception monitoring, and usage profiling do. If you care enough to prevent an attack, chances are you care enough to detect when one is underway or has succeeded. 

Application Hardening Options (representative – not exhaustive)

If you decide that you do agree with Android’s and Microsoft’s recommendation to obfuscate – then you have to decide which technology is most appropriate to meet your needs – again, a completely subjective process to be sure, but hopefully, the following table can serve as a comparative reference.

Thursday, June 13, 2013

Mobile Analytics: like playing horseshoes or bocce ball? (When close is “good enough”)

A recent post on Flurry’s “industry insight” blog caught my eye. The post, The iOS and Android Two-Horse Race: A Deeper Look into Market Share, called out the fact that iOS app users spend more time inside applications than their Android counterparts and then posited three potential underlying causes (condensed here – visit their post for the full narrative):
  • One was that the two dominant operating systems have tended to attract different types of users (we’ll get back to this shortly – this is close).
  • A second possible reason was that the fragmented nature of the Android ecosystem creates greater obstacles to app development and therefore limits availability of app content (suggesting app quality is the driving force).
  • The third possible explanation offered by Flurry was that iOS device owners use apps so developers create apps for iOS users and that in turn generates positive experiences, word-of-mouth, and further increases in app use (combining the two reasons above I suppose).

What struck me in this post was that, while there’s no disputing Flurry’s observation about “time spent in apps” across platforms, the lack of precision within the “2.8 billion app sessions” they track every day made genuine root cause analysis virtually impossible – and led to, in my view, an erroneous conclusion (or, more precisely, a false set of options where the real mechanics were all but invisible). 

Back in January, I published the blog post Marketplaces Matter and I’ve got the analytics to prove it where I compared two versions of one of my apps, Yoga-pedia, published through Google Play and Amazon marketplaces. What’s noteworthy here is that the apps are genuinely identical – functionality, UX, everything - …and yet, the total time spent inside the app distributed through the Amazon marketplace was 40% higher than from Google Play. Which, if you pivot the ratio, total time spent inside the app sourced from Google Play was 72% of the time spent inside the (identical) app sourced from Amazon. 

Now, if I’m interpreting Flurry’s graph in the above blog for January 2013 properly (when my earlier stats were generated), it shows a nearly identical ratio (the total time in “Android apps” was ~75-80% of total time in iOS). So what does that suggest?

  1. iOS users and Android users clearly use different marketplaces – but marketplace source is not something tracked.
  2. iOS apps themselves are of course always different from Android apps (I have an iOS version of Yoga-pedia that is close to my Android flavors – but even these are different). This is a major variable that Flurry analytics cannot separate out – they are looking at the roll-up of all iOS apps and comparing them to all Android apps. 
  3. Treating all Android apps as a single data set (which includes multiple marketplaces) – further obscures what may be one of the key drivers of user behavior – the marketplace community.

So – going back to the first hypothesis, that Android attracts a different class of user than does iOS, I think that is as close as they could come given the kind of data available – the real answer is most likely that the Apple marketplace attracts a different kind of user than does Google Play (and the mix of Amazon Android app users is probably not significant enough to move the big needle).

…And so that begs my original question – is this kind of imprecise (but still accurate) intelligence “good enough” (like horseshoes, bocce ball, and nuclear war)? If this was as far as true application analytics could take me – then maybe… 

BUT, once I had identified the potential role that marketplaces can have – I was able to drill down even deeper to identify the other marketplace delta’s that were (at least to me), extremely valuable including:
  • Amazon click through rate (CTR) was 164% higher than the Google Play CTR 
  • Google Play Ad Delivery Failure rate (ADFR) was 199% higher than the Amazon ADFR  
  • Amazon user upgrade rate was 54% higher than the Google Play upgrade rate (from free to paid app version).

So, in my case, owning my own data and having an instrumentation and analytics platform able to capture data points specific to my needs (precision) turns out to be very important indeed.

So why would anyone use technology like Flurry’s? LOTS OF REASONS relating to ad revenue and all of the other monetization services they offer app developers (that’s why they’re in business) – and that’s I guess the big point. Services and technologies like Flurry’s are built for app monetization – and to the extent that some analytics are an important ingredient in their recipe – you can bet that they’ll nail it – but to do more would be over engineering at best and, more likely, pose a material risk to their entire business model.

For advertising across huge inventories of mobile apps, analytics should be a bit like playing horseshoes – knowing that I can expect iOS to generally perform better than Android is useful. 

On the other hand, as a development organization, if I really want to fine tune my app and optimize for adoption, specific behaviors, and operational/development ROI – I need an application analytics solution built with that use case in mind – not only are alternative analytics solutions missing key capabilities, there are solid business reasons that say those alternative technologies should actively avoid adding those very capabilities for all time.

Saturday, February 2, 2013

The link between privacy and analytics gets stronger still: FTC moves to establish policy and best practices in today’s mobile “Wild West”

As federal and state regulatory agencies become increasingly assertive in defining and enforcing app user rights, application analytics (like PreEmptive Analytics) that embed opt-in policy enforcement and limit data access and ownership are becoming increasingly strategic (and essential) to development organizations.

Today, in a strong move to protect American privacy, the Federal Trade Commission published the report Mobile Privacy Disclosures: Building Trust Through Transparency (PDF). For those that don’t want to read the entire report, checkout the coverage in the NY Times: F.T.C. Suggests Privacy Guidelines for Mobile Apps for a nice overview (not sure how long that link will be live though).

The take away from my perspective is this – while app marketplaces like Apple and Google and advertising services like Flurry continue to fall under increasing scrutiny, the app developer is no longer flying under the radar or going to be given a pass for not understanding the rapidly emerging policies, recommended practices and general principles.

From the referenced NY Times article above…

“We‘ve been looking at privacy issues for decades,” said Jon Leibowitz, the F.T.C. chairman. “But this is necessary because so much commerce is moving to mobile, and many of the rules and practices in the mobile space are sort of like the Wild West.”


The F.T.C. also has its sights on thousands of small businesses that create apps that smartphone users can download for a specific service. The introduction of the iPhone created a sort of gold rush among start-ups to create apps featuring games, music, maps and consumer services like shopping and social networking.

“This says if you’re outside the recommended behavior, you’re at a higher risk of enforcement action,” said Mary Ellen Callahan, a partner at Jenner & Block and former chief privacy officer for the Department of Homeland Security.

Even before this report, “the F.T.C. has not been meek,” said Lisa J. Sotto, managing partner of Hunton & Williams in New York. “They have brought a number of enforcement actions,” she said. “Those in the mobile ecosystem know they’re in the regulators’ sights.”

…but do app developers really know?

In an earlier post of mine, COPPAesthetics: form follows function yet again, I lay out in more detail both the privacy concepts that the FTC are developing and the technical and functional capabilities (and business models) that distinguish application analytics from the other analytics categories out there. These features include opt-in policy enforcement (for both regular usage and exception handling), encryption on the wire, greater control of data collection and more…

COPPA is a much more formal set of requirements to protect children with severe sentencing guidelines and a growing set of precedents where app developers are being fined with increasing regularity

– BUT there is little doubt that the FTC is not limiting itself to children’s rights – in its latest report, the FTC recommends that:

“App developers should provide just-in-time disclosures and obtain affirmative express consent when collecting sensitive information outside the platform’s API, such as financial, health, or children’s data or sharing sensitive data with third parties.” (Page 29 of the report)

If you’re building mobile apps or services that support mobile apps and have been “getting by” using marketplace and marketing analytics services to get user and app usage feedback – be very careful – expect these services to become more and more restrictive – (even dropping apps that appear to be too risky). They will (rightly so) limit their data collection to fall within (and probably well within) regulatory constraints leaving developers to operate their apps “in the dark.” (or assume the risk of non-compliance)

Again from the NY Times article: “Morgan Reed, executive director of the Association for Competitive Technology, a trade group representing app developers, said that the organization generally supported the commission’s report but that it had some concerns about what he called “unintended consequences.” If app stores are worried about their own liability over whether they have adequately checked the privacy protections of a mobile app they sell, they might err on the side of caution and not screen for privacy at all, he said.”

App developers are welcome to collect runtime data necessary to operate (and improve) their applications (see my COPPA post for more clarity here) – collecting data usually only becomes an issue when that data is shared or used for other purposes or by other parties – and that is at the heart of application analytics and what distinguishes it from its peers. 

Application analytics is all about improving application quality, ensuring operational excellence and delivering a superlative user experience – there is no ulterior motive or agenda.

Thursday, January 31, 2013

Marketplaces Matter and I’ve got the analytics to prove it


As I've covered many times in earlier posts, I've used PreEmptive Analytics to instrument a family of mobile yoga apps from TheMobileYogi. These apps are deployed across iOS, Android and Windows. The yoga apps are packaged in a variety of ways. Two apps – Yoga-pedia (free) and A Pose for That (premium) – are direct-to-consumer using a “freemium” model that includes embedded ads inside yoga-pedia. There are also a white-labeled app platform that can quickly generate a “re-skinned” app personalized for yoga studios, retailers and other “wellness-centered” businesses. And with all of these combined, I’m happy to report that we've passed the 110K download mark and still growing by the thousands each week.

The Issue at Hand

One adoption/monetization “variable” that is rarely measured in a clean way is the impact/influence that an app’s marketplace can have on the success of the app itself. This is in large part a practical issue – it’s not easy to compare, for example, Apple’s App Store with Google Play because the apps themselves are often quite distinct from one another – and so isolating the marketplace influence from the apps themselves can be tricky. However, with Android, we publish identical apps through two very different marketplaces; Amazon’s Android App Store and Google’s Google Play marketplace. By focusing on apps that are identical in every way BUT the API calls to the respective marketplaces, we can start to drill into the direct and indirect consequences of marketplace selection. 

Android makes up roughly 51% of TheMobileYogi downloads.

Android downloads combine both Amazon and Google Play adoption.

Android Downloads of Yoga-pedia

As of January 29, 2012, the total downloads of Yoga-pedia were:
  • 21,109 Amazon (36% of the total) 
  • 36,981 Google Play (64% of the total) or said another way, 
Google Play downloads were 75% greater than from Amazon.

…But downloads only tell a very small part of the story. What are users doing AFTER they download the app? How often do they use the app, for how long, and what exactly are they doing when they are inside?

Yoga-pedia Sessions

Using PreEmptive Analytics Runtime Intelligence, we see that there are in fact striking differences between the Google Play user population and the Amazon user population.

One glaring difference is the total number of users in each community.

The total unique users of from Google Play is 208% higher than that of Amazon.

If we were to stop here, I think our conclusion would be obvious – Google play delivers more downloads and more unique users than Amazon – and that has to make it a clear winner right? (Note, there has been no difference in marketing, advertising, etc. between the two marketplaces – specifically, we have done none).

…but if we were to stop here, we would be making a very big mistake!

How much time is spent inside the app? 

Another glaring difference that our analytics reveal is the difference between the average session length of our users – Amazon users tend to stay inside the app almost 3 times longer!

So – if we multiply the total number of sessions by the average session length, we can calculate how many hours were spent inside Yoga-pedia.
  • Amazon: (41,937 sessions) X (13.88 minutes per session) = 9,701 hours 
  • Google Play: (75,346 sessions) X (5.5 minutes per session) = 6,907 hours 
Total time spent inside the app distributed through the Amazon marketplace is 40% higher than from Google Play. 

If I am trying to maximize ad impressions, establish a brand or hold my user’s attention toward some other objective, Amazon now looks significantly more attractive to me than Google Play.

User behavior

Since Amazon users spend so much more time inside Yoga-pedia – how is their behavior different and how does that translate into measurable value? 

Returning users

Returning users (in red) form the majority of the Amazon session activity – Google Play users are less likely to use the app multiple times – they are “tire kickers’ for the most part. Returning users are roughly equivalent across the two marketplaces even though there are many more Google Play users overall.

Returning users are loyal and a lasting “relationship” can be established – whether you’re selling something, hoping to influence their behavior, or tap their expertise – recurring users are always “premium.” 

Ad Click Through Rate (CTR)

Moving to a more concrete metric – we can compare total impressions, Ad Click through Rates (CTR) as well as Ad Server Errors – for this analysis, we’re just looking at 30 days. Note: in both cases, the apps use AdMob.

Google Play
Ad Impressions
Ad Delivery Failure
Ad Failure Rate
Click Through Count

Amazon CTR is 164% higher than the Google Play CTR 

Google Play Ad Delivery Failure rate is (ADFR) 199% higher than the Amazon ADFR 

Now, it’s not really possible to isolate WHY these differences exist – but we can make some educated guesses. For CTR percentages – are Amazon users simply more conditioned or likely to buy stuff as compared to the typical Google Play user?

For ADFR percentages, we’re using the same ad service API, so the ad service itself is not to blame. Are the devices being used by Google Play users (as a total population) of lower quality or are they connecting through networks that are not as reliable?

Regardless, that kind of conversion delta is nothing to ignore.


As I've already mentioned, in addition to pushing ads, Yoga-pedia is one half of a freemium model where we hope to get these users to upgrade to our commercial version, A Pose for That.

With PreEmptive Analytics, I’ve instrumented the app to track the feature that takes a user back to their respective marketplace (positioned on the app upgrade page). The ratio of unique users (not sessions) to upgrade clicks tells another important story; how likely is an Amazon user versus a Google Play user to upgrade to our paid app?

Google Play
Upgrade Marketplace
Unique Users
Conversion Rate

Amazon user conversion rate is 54% higher than the Google Play conversion rate. 

User behavior within my app

Yoga-pedia offers its users two locations where a user can click to upgrade; in a “tell me more” about the premium app page and at the end of an “Intro” to the current Yoga-pedia app.

By looking at the split of where users are more likely to “convert,” we can learn something important about the app’s design in general AND the differences between user patterns across marketplaces in particular. As a proportion, Amazon users are more likely to convert from the Intro page than their Google Play counterparts. The Intro page is “deeper” in the app (harder to find) and so this difference in usage pattern may imply a more thorough reading of embedded pages by Amazon users (and this would be supported by the much longer session times).


Exceptions not only interrupt a user’s experience (with all of the bad things that flow from that), they are also a material expense (support, development, etc.). Given that we are talking about two virtually identical apps – would we expect one version to be more unstable (and therefore expensive) than the other?

Google Play
Errors per session

Whether or not we expected it, the Google Play version of Yoga-pedia has an error rate per session that is 15% higher than its Amazon equivalent. 

Again – the analytics at this level can’t tell us why – but we can still make an educated guess regarding the differences in phone type and network stability of the two populations. 


Of course, if you want to drill down into the specific exceptions (and examine stack traces, device types, carriers, etc – all of that is available through analytics as well.

Here are exception details for the error rates described above. Anyone want to help me debug these?

Do marketplaces matter? Of course they do. 

Of course, different apps will yield different results – but I don’t think that there can be any question that each marketplace comes with its own unique bundle of user experience, service level, and general appeal – and that, taken together, these attract their own distinct constituencies (communities) with their own behaviors, likes, dislikes and demographics.

App developers who chose to ignore the market, commerce and security characteristics that come with each marketplace will do so at their peril – the differences are real, they should influence your design and marketing requirements, and they will undoubtedly impact your bottom line and your chances of delivering a truly successful app.

Sunday, January 20, 2013

TheMobileYogi users speak!

Here are 25 app reviews of the various mobile apps we've produced at TheMobileYogi across iOS, Android and Windows phone – across studio, paid and free versions and across the Eastern and Western hemispheres. We are so grateful for our users’ support and feedback. – TMY

Fantastic yoga fun

Excellent app for on the go yogis. It's simple and fast, no nonsense approach fits my style. Here's the pose, here's some pointers, now do it. I can make it as hard as I like.

It would be nice to see it optimized for the pad, and maybe get more rotation friendly, too. Keep up the good work!

· by Wild Beth United States

Enjoyed the free version...

So I figured it's time to buy! The poses are really clear and I like the sequences. Always room for improvement so I'm looking forward to the upgrades. Thanks.

by Wild Beth United States

Thanks for upgrading and the kind words “Wild Beth” – TMY


finaly a good app ye s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s s as s s

by Lourdes Rousseau United States

Awesome Yoga App
I really enjoy "Find a Pose" and "Pose of the Day"! It's so easy to get to Chagrin Yoga's class schedule.
· by dpoes United States

Great app
Awesome for finding a yoga class that fits into your schedule. Great studio and teachers as well.
· by Kelly Lynn United States

We agree - a terrific studio with fantastic teachers! - TMY

  Awesome app!
Love the "pose of the day" along with the detailed description of the proper alignment/techniques! Thanks for this very useful app!
by mcp888 United States

   Chagrin Yoga
Superb app!! Everything I need is here. 5 for sure!!
by Yogageek United States

   Daily dose of Dawn
Sweet motivation for maintaining a daily practice.
by Madrid36 United States

  Chagrin Yoga fan!!
The IPhone app is superb! I love "Is there a pose for that?" and the instructions for "pose of the day"! I also love how the class schedule is available! Fantastic!!:)
· by MoniBoop23 United States

  your portable yoga class
this is way better than 2 yoga apps i paid for...    the price of "free" apps is often pretty high as many intrude your privacy or flood you with adds. not this one. a free cell phone app can probably not substitut a real class if you have no idea of yoga. yoga is a philosophy...people who are looking for a pilates workout kit might consider a different application (; I like it and i think the explanations are easy to follow. Clean simple app that does what it says better than some of the paid yoga apps.
· by wolke.s United States

Thank you for noticing the work we put into our content - TMY


I pray a lot about what i should do to keep my body in has work the best for me and now I can take it with me .
by Linda Barnett United States

  Perfect travel companion
A Pose for That is a great tool when traveling or on the run. It even comes in handy on the subway. Definitely an excellent way to learn more about yoga.
by Nina Adriana United States

This is by far the best yoga app. Whether you are new to yoga or an instructor, you are sure to gain much from it. I am thrilled to have found it!
· by mads1063 United States

 A pose for that
Amazing and surprisingly addicting
· by Obfusc8 United States

 Great for yoga lovers
It's app is great for people who are new to yoga or long time practitioners that wish to refine their skills. This app provides clear pictures, descriptions, and instructions of yoga poses ranging from beginner to advanced. I would highly recommend this app to anyone interested in yoga.
· by Oursisthefury United States

  It's cool application
Kindly and polite instruction, I could begin in comfort. Thx
· by Chappi-n Japan

Arigato Gozaimasu – TMY

  Simply amazing!!
It is the application every yogi should have handy all the time, everywhere.
· by Free Flow Yoga United States

 Yoga in my Pocket
What a wonderful resource! Love both the written and audio directions for pose of the day!
· by hannahbeth00 United States

 Terrific reference app with daily audio lesson streamed to phone
This app offers a long list of poses with supporting images, instruction and an audio lesson streamed daily to the phone - a terrific free resource!
· by Davey128 United States

  Life changing!
This just became apart of my daily routine. I'm finding peace in my iPhone.
· by Nina United States

easy to use and follow along... videos really help
love the english and sanskrit options as well
intuitive interface, easily access anywhere
· by Michael L. United States

this is so relaxing especially for moms who just want to heel away from their kids for a little bit
· by dhdhrie United States

  Fun but challenging
if your just starting yoga and you arn't that strong I recommend not doing anything past some intermediate. But this is calming. the only con would be it doesn't tell you when 2 stop. but other wise its a really good app
· by bubblyrawr lovr United States

  It's like a smartphone encyclopedia
This app offers dozens and dozens of poses including photos, instruction, recommended flows and even some sample videos. Great reference app - i use it all the time.
· by "Agog for Yoga" United States