Kakuro & Calcudoku: Cross Sums

Math Number Puzzle & Mathdoku

Only for iPhone

Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.

iPhone

A new Kakuro and a new Calcudoku every day, free. Unlimited Easy puzzles. One purchase unlocks every level. No ads, no account, no subscription. Works offline. Two classic number puzzles in one calm app. Kakuro is the cross sums puzzle. Calcudoku, also called Mathdoku, is the math grid puzzle. Fill each grid so every sum adds up. A NEW PUZZLE EVERY DAY Get a free daily Kakuro and a free daily Calcudoku. Everyone plays the same puzzles on the same day. Solve one each day to keep your streak. HOW TO PLAY KAKURO Put the digits 1 to 9 in the white cells. Each run of cells adds up to the clue beside it. A run never uses the same digit twice. HOW TO PLAY CALCUDOKU Each row and column holds each number once. Each cage must reach its target with the math sign shown: add, subtract, multiply or divide. FOUR LEVELS Easy, Medium, Hard and Expert, in several grid sizes. Every puzzle has exactly one solution, so you can always solve it with logic. No guessing needed. TOOLS THAT HELP • A 1-minute tutorial for each puzzle • Hints that explain the next step, not just the answer • Pencil marks for your notes • Undo and redo • A timer for each puzzle • Mistake marks, which you can turn off • Leave a puzzle and pick it up later PLAYS ANYWHERE Works offline, with no internet needed. Supports dark mode and VoiceOver. Menus follow your text size. FAIR PRICE Play the daily puzzles and unlimited Easy puzzles for free, with 3 hints a day. One purchase, Unlock All, opens Medium, Hard, Expert, the archive of past daily puzzles and unlimited hints. No ads. No subscription. Family Sharing is supported. PRIVATE No account and no sign-in. The app asks before sharing anonymous play stats, which use a random ID, never your name or email. Questions or ideas? Visit crosssums.pages.dev/support.

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Cross Sums now fills the big inner screen of the iPhone Duo. The grid and the home screen grow to use the extra room.

Version 1.0.1

The developer, Brightwood Labs LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Usage Data

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
Brightwood Labs (Apps)
Size
3.6 MB
Category
Puzzle
Compatibility
Requires iOS 17.0 or later.
  • iPhone
    Requires iOS 17.0 or later.
  • Mac
    Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
English
Age Rating
4+
In-App Purchases
Yes
Copyright
© 2026 Brightwood Labs LLC
  • Developer Website
  • Privacy Policy

    • Supports

    • Family Sharing

      Some in-app purchases and subscriptions may be shareable with your family group when Family Sharing is enabled. Learn More

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