Sudoku Origin

A quiet Sudoku that works anywhere, teaches while you play, and never interrupts a puzzle to show you an ad.

Free with ads · one-time purchase removes them · no subscription

Built for people who actually like Sudoku.

Works with no signal at all

Every puzzle is generated on your device, not fetched from a server. On a plane, underground, or abroad with data off, the app behaves exactly the same. There is no account to create and nothing to sign in to.
No ad in the middle of a puzzle

Ads never interrupt a board you are solving. If you would rather have none at all, a single one-time purchase removes them permanently — it is not a subscription and it does not expire.
Hints that explain, not answers

A hint names the technique that applies and shows you where to look, so you finish the puzzle yourself and recognise the pattern next time. Tapping for a hint teaches you something instead of ending the thought.
Six difficulties, Easy to Extreme

The ladder is real: Easy is genuinely gentle and Extreme genuinely requires advanced technique. Each level generates fresh puzzles, so you are never replaying a fixed list.
Daily, weekly and monthly challenges

A new challenge on each cadence, with a calendar archive so you can go back and finish the days you missed rather than losing them forever.
Small enough to install anywhere

The download is far below the threshold where phones ask you to wait for Wi-Fi, so it installs over cellular without a confirmation prompt — unlike much of this category, which routinely runs past 200 MB.