Sum Fun

Sharpening minds since 2015

Free · Designed for iPad. Not verified for macOS.

Sum Fun – The Number Puzzle Game for Sharp Minds Place numbers, match sums, blast the board! Sum Fun is the unique number puzzle that's been loved by players worldwide since 2015. How To Play (3 simple rules): 1. Place a number into any empty slot 2. If it matches the last digit of the sum of its neighbours, they get blasted away! 3. No matches? Place a number that sets up a future sum, and keep blasting until the board is empty! Why you'll love Sum Fun: • Easy to play, fun to master – just 3 simple rules, with surprising depth and strategy • 20+ creative board shapes – play on a Hexagon, Pyramid, Star, Heart, Turtle, Rocket, Butterfly, Snowflake, and many more, with new shapes added regularly! • Seasonal Postcard Challenges – play limited-time events and collect unique downloadable artwork (by real artists!) • No time limits – play at your own pace and relax while keeping your mind sharp • Challenge friends (and yourself!) – share puzzles via QR code, text code, or pass-and-play. No internet needed! • Brain-boosting gameplay – after a few games, you'll be adding up numbers faster than you can say, 'What's six plus eight?' • No annoying pop-up ads – just banners and optional rewarded ads. Your concentration stays on the puzzle, where it belongs! We play Sum Fun too, and keep the experience friendly. • Multiple themes – choose from Light, Dark, and Midnight to suit your style If you enjoy Sudoku, Kakuro, or other number-based brain games, you'll love the unique twist of Sum Fun. Exercise your mind, master the numbers, and discover why players keep coming back – download free today!

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We've added new Springtime shapes to enjoy, including Tulip, Easter Egg, Butterfly, and more! Join us as we welcome Easter with our new Postcard Challenge! Uncover unique Easter artwork as you play this limited-time event. And also – • Replay any of your 3 most recent games – beat your own score or challenge friends! • We've added a new midnight theme, perfect for sum night-time fun! • View all of your completed postcards in Achievements on the Home Screen • Our tutorial has been revamped to help new players have sum fun even faster. Need a recap of the rules? Head over to help, and tap Play Tutorial!

The developer, Greg Sharpe, 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 Used to Track You

    The following data may be used to track you across apps and websites owned by other companies:

    • Usage Data
  • Data Not Linked to You

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

    • Location
    • Identifiers
    • Usage Data
    • Diagnostics

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

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

Provider
  • Wondrous Minds Company Limited
Size
  • 165 MB
Category
  • Puzzle
Compatibility
Requires iOS 15.0 or later.
  • iPhone
    Requires iOS 15.0 or later.
  • iPad
    Requires iPadOS 15.0 or later.
  • iPod touch
    Requires iOS 15.0 or later.
  • Mac
    Requires macOS 15.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
English and 4 more
  • English, German, Japanese, Korean, Vietnamese
Age Rating
4+
Copyright
  • © 2026 Wondrous Minds Company Limited