Frequently Asked Questions
How do I play Sudoku?
Fill every row, column, and 3×3 box with the digits 1–9 so that each digit appears exactly once in each row, column, and box. Tap a cell to select it, then tap a number to place it.
What is Note Mode?
Note mode lets you write small candidate numbers in a cell while you figure out the solution. Tap the pencil icon to toggle notes mode on or off. Notes are automatically cleared when you place a number in that cell.
How do hints work?
Tap the lightbulb icon to reveal the correct number for the selected cell. Hints are available for all difficulty levels and can help when you're stuck.
What does the Pro upgrade include?
Pro unlocks Hard and Expert difficulty levels, additional neon color themes, and the neon glow visual effect for the grid. It is a one-time purchase with no subscription.
I purchased Pro but it's not showing up. What should I do?
Open the app, go to Settings, and tap "Restore Purchases." This will re-activate your Pro entitlement on the current device. Make sure you're signed in to the same Apple ID used for the original purchase.
Can I restore my progress after reinstalling?
Game progress (current puzzle, timer, notes) is stored locally on your device. Reinstalling the app will reset progress. Stats are also stored locally at this time.
The app crashed or I found a bug. What should I do?
Please contact us using the button below. Describe what happened and which device and iOS version you're using. We aim to respond within 2 business days.
Contact Us
Can't find an answer above? Send us an email and we'll get back to you as soon as possible.
Send Email