This app was mentioned in 4 comments, with an average of 2.00 upvotes
For what platform? On android I use this: https://play.google.com/store/apps/details?id=com.google.android.chess
You can change the level midgame, has analyzer, position editor and no ads.
This is good, clean interface, no ads, no permissions.
https://play.google.com/store/apps/details?id=com.google.android.chess&hl=en
I like Chess, simple with no frills.