This app was mentioned in 5 comments, with an average of 1.00 upvote
If you are on android and using chess.com app, install this app. After the game on chess.com, hit the "share PGN" button on chess.com and choose this app's icon.
If you are looking to manually analyze the position (as in look at the engine output and then judge for self), then there are several options like Droidfish, Analyze This, Chess for Android, PGN Master... One specialty of Analyze This app (developed by me!) is that it can even Auto annotate the game. So you open the game and it will auto analyze the game in the background, and even provide verbose English comments!
There is Lichess as well as this : https://play.google.com/store/apps/details?id=com.pereira.analysis
Just share the FEN/PGN to either of these apps directly
I use this app on my phone: https://play.google.com/store/apps/details?id=com.pereira.analysis