All Candidates
Add every valid candidate note in one tap, without revealing the solution.
Need a hand?
Killer Sudoku: Quick Notes works offline and keeps your game on the device. If something does not look right, these quick steps solve most issues.
A game feels stuck
Pause and reopen the game. Your current board, notes, timer, and saved branches are restored automatically.
Try another idea safely
Open Branches below the board, name the current state, then load it again after testing a different digit.
Contact support
Include your iPhone model, iOS version, difficulty level, and a screenshot if the issue is visual.