Support

Sudoku Unlimited+ by Lauterstar

Need help with Sudoku Unlimited+? Find answers to common questions below, or get in touch directly. We aim to respond within one business day.

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Frequently asked questions

Is Sudoku Unlimited+ really free?

Yes. Free to download and play, with no account and no ads. Free play includes unlimited Beginner games, numbered free game sets on Easy through Extreme, and a free daily puzzle at every level. Sudoku Unlimited is an optional one-time purchase ($4.99, no subscription). It unlocks unlimited puzzles at every level, plus unlimited hints and misses and every color palette.

I was already playing before the Unlimited update. Do I have to pay now?

No. If you installed the app before the Sudoku Unlimited update, you keep everything you had: unlimited puzzles, unlimited hints and misses, and every palette, at no charge. The app applies this on its own. The purchase screen shows "Unlimited included" instead of a price. Only new installs see the free game sets and the optional purchase.

Will I ever repeat a puzzle?

With the one-time Sudoku Unlimited upgrade, never: each puzzle is made fresh, on demand, and checked to have exactly one solution. Free play has fixed game sets per difficulty, and those repeat once you finish them. You also get a fresh daily puzzle every day. Beginner puzzles come from a hand-picked set, great for learning the basics.

How do I restore my Sudoku Unlimited purchase?

On a new device, or after you reinstall, open the app and go to Settings → Sudoku Unlimited. Open the purchase screen and tap Restore Purchase. Sudoku Unlimited is a one-time purchase tied to your Apple Account. Restoring it costs nothing.

How does the daily puzzle work?

Each day you get a fresh puzzle, tuned to your current difficulty level. Solve it to extend your streak. Streaks track per difficulty level. Solve often and you can earn a streak freeze, which covers one missed day on its own.

How do I turn on daily reminders?

Open the app, go to Settings, and turn on Daily Reminder. Pick the time that works best for you. Reminders are set up right on your device. No data leaves your phone to send them.

Where is my progress saved?

All game data stays on your device: your solve history, stats, streaks, and settings. Nothing is uploaded to our servers. This also means your data does not sync across devices on its own.

I lost my progress. Can it be restored?

Your data lives only on your device. If the app is deleted, or the device is erased without a backup, we cannot bring your progress back. To protect it, back up your device to iCloud or your computer often.

The app crashed or something went wrong

Email us at support@lauterstar.com and tell us in a few words what happened: what you were doing, what device you are on, and which iOS version you run. We will look into it and get back to you as soon as we can.