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For bug reports, feature requests, or any questions:
Go to Settings (gear icon) and tap "Restore Purchase". This will restore your premium unlock on any device signed in with the same Apple ID.
Yes. Inkgrid Sudoku is fully offline. Daily puzzles, statistics, and all features work without an internet connection.
If iCloud is enabled on your device, your puzzle progress and statistics sync automatically across all your Apple devices. We never see or access this data — it stays within your iCloud account.
Premium is a one-time purchase that unlocks: Endless Challenge mode, all difficulty levels (Medium, Hard, Master), solution replay, enter-your-own puzzles, and iCloud sync.
Daily puzzles, Easy difficulty in Endless mode, full note-taking tools, statistics, and the widget are all free forever.