Android version history

The version history of the Android mobile operating system began with the public release of its first beta on November 5, 2007. The first commercial version, Android 1.0, was released on September 23, 2008.
The operating system is developed by Google on a yearly cadence since at least 2011.^[1] New major releases are announced at Google I/O in May while still in beta testing with the stable version usually released to the public between August and October.