Google keeps logs of all Android smartphones that visit the Google Play Store. This information helps to prioritize efforts for supporting different devices by revealing which devices are active in the Android and Google Play ecosystem.
According to the charts, Android devices running Jelly Bean and KitKat still takes a huge chunk of the ecosystem. Over 70% to be precise. This goes to tell us the level of fragmentation on Android. Gradually, Lollipop is gaining ground with software updates and new devices release, though we don’t see it overtaking KitKat or Jelly Bean any sooner.
This data reflects devices running the latest Google Play Store app, which is compatible with Android version 2.2 and higher, this means that devices running older versions are not included. Follow the source link to read the full report.