Questions, bugs, or feedback about The Caribbean Sudoku — we read every email.
Open the app → Store → Premium. It's a one-time purchase that removes every ad for good and unlocks unlimited hints and undos.
Open the app → Store → tap "Restore Purchases". Premium is tied to your Apple ID and restores automatically on any device signed in with the same Apple ID. If it's still missing, make sure you're signed in to the same Apple ID as when you purchased, then contact us with your order confirmation email.
Enable it in Settings → iCloud Sync. Your saves, statistics, and Daily Challenge progress then sync automatically between your iPhone and iPad through your own private iCloud account. We never see this data — see our Privacy Policy.
In the app: Settings → "Reset saves" or "Reset statistics". To also remove your iCloud data: iOS Settings → your name → iCloud → Manage Account Storage → The Caribbean Sudoku → Delete Data.
No — every game mode is fully playable offline. An internet connection is only used for online multiplayer duels, the Daily Challenge leaderboard, iCloud sync, and ads in the free version.
You can duel a friend online via Game Center, or locally over Wi-Fi/Bluetooth with no internet required — you both race on the exact same grid, and the faster correct solve wins.
Please write to us at contact@caribtechstudio.com with your device model, iOS version, and — if possible — a screenshot. Every puzzle in the app has exactly one valid solution; if something looks off, we want to know.