This app was mentioned in 3 comments, with an average of 2.67 upvotes
Thanks for reminding me I have a solver app that I've never got to use, the solution if you want.
https://play.google.com/store/apps/details?id=com.enigon.sudokusolver&hl=en&gl=US there are android apps like that
Sudoku Solver I used to use just because I could.