According to stats published by Google, the newest Android release, codenamed KitKat, is powering around one out of every four Android devices accessing the Google Play store.
The data, which is based on smartphones and tablets accessing the Google Play store over a 7-day period ending on September 9, 2014, shows that Android 4.4, codenamed KitKat, is installed on 24.5 percent of devices.
Android 4.4 was release on 31 October, 2013, and first made its public appearance on the Nexus 5, but it now powers a whole range of smartphones and tablets. However, the reign of KitKat is slowly coming to an end now that Google has unveiled its successor, Android L.
This latest version has a long way to go to catch up with the previous release, codenamed Jelly Bean. The Jelly Bean release, which includes versions 4.1.x, 4.2.x and 4.3, still power over a half of Android devices and makes it the single most popular version. Android version 4.1.x is the single most popular release, powering a quarter of all Android devices.
All this means that there's considerable fragmentation among devices running Jelly Bean, with the majority unable to benefit from features introduced in versions 4.2.x, 4.3, and now 4.4 as KitKat is getting traction on devices.
With KitKat and Jelly Bean now powering over three quarters of the Android devices accessing the Google Play store, the older platforms are slowly being squeezed out. However, they are still likely to remain significant well into 2015. By which time, KitKat will have been superseded by Android L, and a new Android release will be fighting to gain traction.