Android apps will soon be able to update while you’re using them

This was possible since long (2013) but Google decided to keep it "banned" via policy which stated:

> An app downloaded from Google Play may not modify, replace or update its own APK binary code using any method other than Google Play's update mechanism.

https://arstechnica.com/information-technology/2013/04/googl...

https://gizmodo.com/5995416/google-bans-non-play-store-andro...

This has been somewhat possible on both Android and iOS for some time if you consider that a well-developed application may use web services to deliver its data as well as certain sets of UI/UX instructions. Many applications I have developed over the years have been self updating in this manner.