Measuring the success of your iPhone App

“Number 1 app in UK, France and Germany…”. Those who regularly browse the Apple AppStore hunting for applications (apps) will undoubtedly be familiar with this type of catch phrase.  It’s generally what users first read when they land on app description pages (as if they were all number one!). Developers and designers use this type of technique to lure candid users to download the app by making them believe it’s the best of its kind on the market. This also illustrates how the success of an app is often assumed: the higher in the ranking, the more successful it is. But as you may probably know already, this approach is entirely flawed.

First of all, one can wonder how these rankings are built. As it is rarely clearly stated, we can only suppose that the number of downloads of an app governs its position in the table. But again, over what period of time? Number of downloads in the last month, quarter, year? This brings in the process a lot of vagueness and can surely not be used as a success measurement tool. Moreover, as Jakob Nielsen suggests in his column about iPhone App (http://www.useit.com/alertbox/mobile-apps-initial-use.html), users download more app than they actually need and use, which corroborates the idea that the number of downloads is not representative of the usage and can be resorted to as success criterion.

Then comes the question of the popularity of an app. App owners can write comments on the app description pages of the AppStore and rate them on a scale from 1 (negative) to 5 (positive). As a user experience professional, I strive to get the voice of the customer heard by my clients but I don’t consider it to be a viable success measurement method. Personal opinions are very subjective and tend to be only expressed when something goes wrong or incredibly well. Moreover, most of the app ratings derive from the ‘rating prompt’ that pops up on the iPhone when a user decides to delete an app. This biases the results in a negative way.

So how should the success of your app be measured? From a business perspective, the response is simple: the success of an app should be measured just like the success of a website, i.e. by defining and tracking KPI. Most of the apps provide a web-based service, which implies a digital connection between phones and web servers, just like there is a connection between PC and web servers. This allows data to be captured, such as number of information requests, conversion rates, app usage duration, app usage frequency, etc. In terms of web analytics tools, the capture of mobile phone applications usage is only at an embryonic stage but the trend is on the up and some of the current tools on the market are already capable of monitoring app usage.

Boasting about an app being the most used rather than the most downloaded would surely be more credible to end users!

This post was originally posted by Xavier Klingenfus