How can we help?

No. There is no sign-up, account or email needed. Just open the app and play.

We do not sync progress between devices. Progress, scores and streaks are saved on your device only, which keeps them private. Your phone's own backup or transfer service may bring them across, depending on its settings.

All game data lives on your device, so deleting the app removes it from your device. Copies in your phone's backups follow your backup settings. If you emailed us and want that message deleted, write to support@ovationcreations.com.

Classic Sudoku rules plus cages: groups of squares, each with a sum. The numbers in a cage add up to that sum and never repeat. Tap a square in the app to see which number combinations its cage can use. Try a Killer board now.

Everyone gets the same daily puzzle for each level, and it changes at midnight on your device. A daily you start before midnight still counts if you finish it by the end of the next day.

Hints are always available. Each one costs some of your puzzle score and resets your combo, so finishing without hints earns a bonus. In Zen mode, hints cost nothing.

Yes. Every puzzle has exactly one solution, and each level is graded by the logic techniques needed to solve it.

Drag blocks from your tray onto the board. Fill a whole row or column to clear it. The game ends when none of your blocks fit.

In Classic, each new tray is checked before it is dealt, aiming for three blocks you can place in full. When the board is nearly full, a tray may only partly fit. The Daily Challenge deals the same trays to everyone.

Hold saves one block to use later. Undo takes back your last move. Classic gives you three undos and the Daily Challenge gives you one. Practice mode, offered after the lessons, has unlimited undos.

In Classic and the Daily Challenge, Next Set shows one piece from your coming tray, so you can plan your moves.

Tap the palette button. Each locked block set shows the goal that unlocks it, such as clearing 50 lines in total.

Everyone gets the same challenge each day. Finish it to earn a medal and build your streak.

Place every domino from your tray on the board. Each colored region has a rule, such as a total its pips must add up to. A domino can cross between two regions. Tap Learn in the app for a short interactive lesson.

Tap a domino to turn it, then tap a square on the board to place it. You can also drag it. Undo and To tray are always available.

Switch to Beginner or Easy, or tap Hint for a nudge toward the next move.

Drag the pieces onto the board, turn them to fit, and fill every square. Each box lights up when it's complete. Tap Learn for a quick walkthrough.

Pieces with a gold pin are already in place. Fill in around them.

There is one new Daily puzzle each day, the same for everyone. Your streak survives one missed day a week.

Yes. Each puzzle is built around a complete board layout, so every piece has a place. Hints are there when you need them.