The Android Open Source Project maintains Android software, and develops new versions. Because it’s open source, this software can be used for any purpose, including developing devices that aren’t compatible with other devices based on the same source.

Is Android open source or not?

Android is an open source operating system for mobile devices and a corresponding open source project led by Google. … As an open source project, Android’s goal is to avoid any central point of failure in which one industry player can restrict or control the innovations of any other player.

When did Android become open source?

Android (operating system)