We usually reply within a day or two.
Tap two digits that are equal (like 5 and 5) or that add up to ten (like 6 and 4). They must be next to each other, in a straight row, column, or diagonal line, or connected across cells you have already cleared — including the end of one row wrapping to the start of the next.
Every calendar day has one shared board that is the same for every player, so daily streaks are fair. It resets at your local midnight.
Solve the daily puzzle to extend your streak. Miss a day and the streak resets — you can restore a missed day from the Calendar using coins or a streak-saver.
Use Undo, ask for a Hint, or tap Add Row to bring the remaining digits down again. The whole game is designed to always be solvable.
Open the Shop or Settings and tap Restore Purchases. Coins are also backed up to your device Keychain, so reinstalling the app keeps them.
Yes. The game plays entirely offline. The only optional online feature is App Store purchases.