Stockfish 11+ variants

Hola.
im just found that the android app uses stockfish 11 and the browser version uses stockfish 14, but why? and there will be in a near future stockfish 13 or 14 avaliable for the app?

thanks in advance =)

They're building a new app: lichess.org/blog/Y2Z47hEAAGUB7i7A/lichess-recruits-full-time-mobile-developer

And they said that no new features will be added to the current app in the meantime, so probably no newer version of stockfish anytime soon.

thank for the answer, at least they are improving the mobile app =)