Honest question, is there any open source non-subscription based no-frill virtual chess board on Android that allows you to simply play chess offline against human or AI, in the same spirit as VLC on Android?
Apparently, Lichess has 'Over the board' feature that allows you to play with your friend offline, nice!
JustChess (Chess for one or two players) https://f-droid.org/packages/com.alaskalinuxuser.justchess/
Also seems to have all the grand masters on there as players, Magnus ignored my request for a game though.