TvOS

tvOS (formerly Apple TV Software) is the operating system software derived from iOS and developed by Apple Inc. for its Apple TV and HomePod lines of home media devices.

Product history
Apple TV Software, the predecessor to tvOS, was based on a version of iOS since iOS 4.1, which was used for the 2nd-generation Apple TV.

The software was renamed tvOS in 2015, starting with version 9, which was based on iOS 9. Version 13.4 merged in support for Apple's HomePod smart speaker in April 2020. It was updated to 13.4.5 the following month. It was updated to 13.4.8 on July 15, 2020. The current version of tvOS as of January 26, 2021 is 14.4.