EverySudoku

Nine digits, eighty-one cells. EverySudoku keeps things simple and puts the puzzle first — a board for five minutes on the bus or half an hour before bed.

Highlights

• 2,000 stages — Easy, Normal, Hard and Very Hard, 500 each. Every puzzle was actually solved and graded by the techniques it needs, and all have exactly one solution
• Daily Sudoku — a new puzzle per difficulty every day, everyone plays the same board, ranked by time. One try a day, with the same 3 hints and 3 mistakes for everyone. Rankings reset at midnight Korea time
• Notes, keys that disappear once a number is complete, wrong numbers in red
• Three mistakes allowed. In stages you can watch an ad to continue once or get extra hints
• Your board is saved, and stages work offline
• Start as a guest with no sign-up. Link Google or email to carry records to another device

Free to play with no in-app purchases. Contains ads (banner, interstitial and rewarded). Korean and English.