Haiyue StudioFind your kind of challenge
Choose three difficulty levels, try fixed rule tutorials, or combine compatible variants. Generated puzzles are checked for a unique solution under their active rules.
Moonlight Sudoku · iPhone & iPad
One more clue.
One more discovery.
A familiar grid opens up a world of possibilities. Follow a glowing digit, trace a thermometer, or connect two overlapping boards. There is always another way to think.
Coming to the App StoreExplore the game ↓
English · 简体中文 · 日本語
Same nine digits.
New possibilities.
Classic, LED, Killer, overlapping grids and more.
Reason it through
Follow step-by-step explanations, cross out candidates and undo changes. Adjust automatic candidate assistance as you become more confident.
Keep a puzzle for later
Name and save your puzzles with entries and notes. Share a puzzle QR code, scan a friend's code, or export a picture of the board and its rules.
Start with the classics.
Explore at your own pace.
Free play
Classic + LED
- Generate classic and LED puzzles.
- Five free hints each local calendar day.
- Keep up to 20 named saves.
- Try fixed puzzles for additional rules, with unlimited hints in those trials.
- Choose an available rewarded ad for three extra hints.
Optional one-time purchases
Open up every rule
- Basic and advanced rule packs.
- Full version: all rules, unlimited hints and unlimited saved puzzles.
- No need to watch ads with the full version.
- Restore eligible purchases with the same Apple Account.
No subscription. Prices appear in the app before purchase. Store purchases and rewarded ads will be available with the public release; availability varies by region and network.