GridNook Sudoku Support

For help with GridNook Sudoku or to suggest a feature, email:

service@bytexero.com

Please include your device model, operating system and app versions, and the steps to reproduce the issue. Do not send passwords or other sensitive information.

Resume a puzzle

Your board, pencil notes, and settings are saved on your device. Reopen the app to continue your current puzzle. Clearing app data or uninstalling the app may remove this local data.

Hints and pencil notes

Select an editable empty square and use a hint to fill its answer. Turn on notes to record possible digits. Use undo or redo to adjust your moves.