I made a minimal Sudoku app on weekends — would love your feedback

Hey r/sudoku, I built a simple Sudoku app in my spare time

Been messing around with Flutter for a while and finally finished something usable. It's an offline puzzles without any ads.

Not trying to compete with the big guys, just wanted a Sudoku app I'd actually want to use. Been testing it myself for a couple weeks and it's working pretty well.

Would love some honest feedback — especially on difficulty levels and whether the hints make sense (I can never tell if they're helpful or just obvious).

Link if you want to check it out: https://play.google.com/store/apps/details?id=com.simplecleanapp.sudoku_simple_n_clean_app

Thanks!