Support
Need help with Sudoku Unlimited+? Find answers to common questions below, or get in touch directly. We typically respond within one business day.
Contact us
Email support
support@lauterstar.com
Frequently asked questions
Is Sudoku Unlimited+ really free?
Yes. Sudoku Unlimited+ is free to download and play. No account is required — just open the app and start solving.
Will I ever repeat a puzzle?
On Easy and above, no. Every puzzle is freshly generated so you will never see the same board twice. Beginner puzzles use a curated set that is great for learning the basics.
How does the daily puzzle work?
Each day a fresh puzzle is made available, tuned to your current difficulty level. Complete it to extend your streak. Streaks track per difficulty level, and you can earn a streak freeze by solving consistently — it covers one missed day automatically.
How do I turn on daily reminders?
Open the app, go to Settings, and enable Daily Reminder. You can choose the time that works best for you. Reminders are scheduled locally on your device — no data leaves your phone to deliver them.
Where is my progress saved?
All game data — your solve history, statistics, streaks, and settings — is stored locally on your device. Nothing is uploaded to our servers. This also means data is not automatically synced across devices.
I lost my progress. Can it be restored?
Because data lives on your device, progress cannot be restored remotely if the app is deleted or the device is erased without a backup. To protect your data, make sure your device is backed up to iCloud or your computer regularly.
The app crashed or something went wrong
Email us at support@lauterstar.com with a brief description of what happened — what you were doing, what device you are on, and which iOS version you are running. We will look into it and get back to you as soon as possible.