Sum Fun
Greg Sharpe Games iPhoneiPadiPod touch
Sum Fun is a free Games app for iPhone and iPad by Greg Sharpe. Rated 4.9/5 from 33 ratings. Requires iOS 15.0. Updated October 14, 2026.
- Rating
- 4.9
- 33 ratings
- Price
- Free
- on the App Store
- Size
- 181 MB
- Age 4+
- Updated
- Oct 14
- 2026 · v2.14
Screenshots
About Sum Fun
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! • No annoying pop-up ads – your concentration stays on the puzzle, where it belongs! We play Sum Fun too, and keep the experience friendly. • Brain-boosting gameplay – after a few games, you'll be adding up numbers faster than you can say, 'What's six plus eight?' • 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!
Ratings & reviews
4.9
33 ratings
What’s new
Version 2.14 · Updated October 14, 2026
We've added an extra dose of fun to your day, with our new Daily Challenges! Finish 3 puzzles within the required number of moves, and unlock a special bonus game! Plus: • Play our new Halloween shapes including Pumpkin, Cat, Hat, and Bat! • Collect unique artwork inspired by our travels in our Postcard Challenge • The Beginner shape collection has expanded, including Pine Tree and Egg • We've improved the home screen for tablets, automatically showing you game stats in landscape orientation • More appearance customisations are available, including experimental board colourings to add a splash of colour to your games
App privacy
The developer, Greg Sharpe, reported these privacy practices to Apple.
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Usage Data: Advertising Data
Data Not Linked to You
The following data, which may be collected but is not linked to your identity, may be used for the following purposes:
- Location: Coarse Location
- Identifiers: Device ID, User ID
- Usage Data: Product Interaction, Advertising Data, Other Usage Data
- Diagnostics: Crash Data, Performance Data, Other Diagnostic Data
Used for: Third-Party Advertising, Analytics, App Functionality
Alternatives to Sum Fun
Looking for apps like Sum Fun? Here are 6 similar apps on the App Store. The highest rated is Mathscapes: Math Brain Algebra (4.8/5), and all 6 are free to download.
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| App | Rating | Price | Last updated | Compare |
|---|---|---|---|---|
| Sum Fun | 4.9 / 5 (33 ratings) | Free | October 14, 2026 | |
| Mathscapes: Math Brain Algebra | 4.8 / 5 (759) | Free | May 10, 2026 | Compare |
| Climb Higher | 4.6 / 5 (48) | Free | Sep 17, 2026 | Compare |
| Shatterbrain | 4.6 / 5 (437) | Free | Sep 17, 2026 | Compare |
| Kakuro: Number Crossword | 4.8 / 5 (1,947) | Free | Jul 28, 2026 | Compare |
| Brain Dots | 4.4 / 5 (8,184) | Free | Oct 6, 2026 | Compare |
| orange (game) | 4.7 / 5 (406) | Free | Sep 2, 2026 | Compare |
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