Sudoku · Rondo

Sudoku, from easy to expert

A fresh puzzle whenever you want one, four difficulties, pencil notes and a timer. Beat your best time and climb the leaderboard.

Free. No account, no email, no password — install and play.

In the app

1A new puzzle whenever you want one, with your best score and time kept on your profile.

2Leaderboards among friends and worldwide — the same daily deal for everyone.

3Daily quests and achievements — every game counts.

4No account, no email, no password: install and play.

Fill the 9×9 grid so that every row, every column and every 3×3 box contains the digits 1 to 9 exactly once.

Long-press a cell to pencil in candidates. A hint fills one cell when you're stuck; mistakes are marked as you go.

Your time is your score. Solve the same difficulty faster to set a new record and move up the leaderboard.

Is Sudoku free on Rondo?

Yes. Every game on Rondo is free to play. Coins and cosmetics are optional and never affect the puzzle.

Do I need to register?

No. Install the app and tap Sudoku; a profile is created for you. You can link a Google or Apple account later to keep it across devices.

Can I compete with friends?

Yes. Your best times and scores go on the leaderboards, and a daily deal is the same for everyone, so friends race the same puzzle.