How can we help?
Questions, ideas, or a puzzle that looks wrong? Write to us. A person reads every message.
Email support
To help us fix things faster, please include your iPhone model, your iOS version, the app version (Settings, then About, legal and credits) and what happened. A screenshot helps. Never send passwords or card numbers: we never need them.
Playing
How do hints work?
A hint finds the next logical step and explains the technique behind it. Tap Hint and read the explanation, which is free. Revealing the exact cells uses one hint from your balance.
Why do my notes disappear?
With Smart notes on, placing a digit clears it from the notes in its row, column and box. You can turn this off in Settings, then Gameplay.
What is Second Chance?
When you reach the mistake limit you can watch an optional video to wipe two of your mistakes (3 of 3 becomes 1 of 3) and keep going. It works once per puzzle.
How is my win rate calculated?
Wins divided by finished games. Restarted or unfinished games do not count. See Statistics in the app for details.
How do I keep my streak?
Solve one Daily Challenge each day. If you miss a day, solve yesterday's Daily from the archive to save the streak for free, or watch an optional video (up to 2 times in 30 days). Streak freezes earned at 7, 30 and 100 days cover a missed day by themselves.
Can I play offline?
Yes. Puzzles work offline. Videos and the store need an internet connection.
How do I change the look?
Open Settings, then Appearance: theme, accent color, grid style and digit size.
How do I report a puzzle problem?
Open Settings, then Help and contact, then Report a puzzle problem. The email that opens already contains the puzzle's seed and difficulty. Or write to support@luminastudio.ai and tell us the mode, the difficulty and what you saw. Every puzzle is built to have exactly one solution, so we want to know.
Purchases
How do I restore my purchases?
Open Settings, then Restore Purchases. You can also tap Restore at the top of the Shop. Use the same Apple ID you bought with. Remove Ads is restored this way, on any iPhone signed in with that Apple ID.
Still missing? Check that you are online and signed in to the App Store, then try again. If it does not work, email us with the date of the purchase.
What does Remove Ads do?
It removes banners and the full-screen ads between puzzles. Rewarded videos stay optional. It is a one-time purchase.
My bought hints are gone.
Hint packs are stored on your iPhone. If you delete the app, or use Delete my data, the hints you bought are removed. Restore Purchases brings back Remove Ads, but not hints you have not used. If you think something went wrong, email us and we will look into it.
How do I get a refund?
Apple handles payments and refunds for App Store purchases, so we cannot refund them. Go to reportaproblem.apple.com and choose the purchase.
Your data and ads
Is my progress saved?
Yes. Progress is saved on your iPhone after every move. If you delete the app, it is erased. If you restore your iPhone from a backup, it may come back with the backup.
How do I delete my data?
- Open Settings, then Privacy and data.
- Tap Delete my data and confirm.
This removes your progress, stats, streak, awards and settings from this iPhone. Purchases are not lost: use Restore Purchases to get Remove Ads back.
How do I delete my anonymous analytics data?
If you allowed anonymous usage statistics, Settings, then Privacy and data shows an Analytics ID and a button that opens an email to support@luminastudio.ai. Send that email. The ID is random and lives only on your phone, so we can only delete data for an ID that you send us.
Why am I seeing ads, and can I limit them?
Sudoku Stars is free to download and shows ads. Remove Ads removes banners and full-screen ads. To limit tracking for ads, use Settings, then Privacy and data, then Ad choices in the game, and iOS Settings, then Privacy and Security, then Tracking.
How do I ask a privacy question or make a data request?
Write to support@luminastudio.ai and put "Privacy request" in the subject. The game has no account, so we cannot look you up by name or email. If you allowed anonymous usage statistics, include your Analytics ID from Settings, then Privacy and data. Everything else is stored on your iPhone, where you can erase it yourself with Delete my data.
Where can I read the privacy policy?
The privacy policy explains what is stored, what is sent and your choices. The terms of use cover purchases and refunds.
Requirements
Which iPhones does it run on?
Sudoku Stars needs iOS 17 or later.
Do I need an account?
No. There is nothing to sign up for.