I like spending every single moment on playing Best Sudoku, it's a new application I've just found and am addicted already! It's great for beginners and advanced players, has 5 difficulty levels, from very easy to extremely difficult. Undo/ redo and auto-save functions! Everything is clean thanks to very good graphics. Check it out!!
https://forums.androidcentral.com/e...ils?id=pl.netigen.sudoku&hl=pl&token=17m12zHf
https://forums.androidcentral.com/e...ils?id=pl.netigen.sudoku&hl=pl&token=17m12zHf