Sumaddle
Jonathan Buchanan Games iPhoneiPadiPod touch
Sumaddle is a free Games app for iPhone and iPad by Jonathan Buchanan. Rated 4.9/5 from 769 ratings. Requires iOS 16.0. Updated September 17, 2026.
- Rating
- 4.9
- 769 ratings
- Price
- Free
- on the App Store
- Size
- 30 MB
- Age 4+
- Updated
- Sep 17
- 2026 · v2.10.0
Screenshots
About Sumaddle
• “Brilliant puzzle game”, UK App Store review Apr 2025 • “Best Puzzle Game I’ve Ever Played”, US App Store review Jan 2025 • “The ONLY iOS game I've never gotten tired of”, Reddit review Apr 2024 This type of logical puzzle was first seen in the Japan Puzzle Championship 2006 and is sometimes known as Doppelblock, or Smashed Sums. When played with pencil and paper, these puzzles can be hard work to solve. Sumaddle changes that by adding the essential element of interaction. This transforms the puzzles into intriguing brain teasers that unfold before your eyes. Each puzzle has a unique solution. Finding the solution involves fitting the number combinations to the clues. The app makes it easy to view the possible combinations, you don’t need to do any sums in your head. Instead, you can focus on using logic to narrow down the combinations and find a fitting arrangement. Some reasons why you will enjoy playing Sumaddle: • puzzles range in size and difficulty from small and simple to large and mind-blowing • more than 150 puzzles are included for free • all puzzles can be solved with pure logic, no mental arithmetic required • the sophisticated built-in help can explain the logical reasoning at each step and also fix mistakes if you go wrong • the built-in help is completely free, use it as much as you like • works offline (great for long journeys) • a high standard of accessibility, including comprehensive support for VoiceOver • ad-free play - there are absolutely no ads! IGRS age rating (Indonesia Game Rating System): 3+ Designed and developed in Winterthur, Switzerland
Ratings & reviews
4.9
769 ratings
What’s new
Version 2.10.0 · Updated September 17, 2026
More options relating to dark mode, along with some small fixes and enhancements. • When the Dark look is selected in the settings, it is now possible to choose whether the background for blocks is solid black or a lighter level of shading. When lighter shading is used, the other squares of the puzzle have a darker appearance. • The option for blocks to be painted with a special fill effect has been extended to the Dark look too. Fill effects for blocks were introduced in the previous app version in connection with the new Extra Dark look. • Improved the way the puzzle generator picks up the latest score from the leaderboard when returning to the app after a period of inactivity. • Fixed an issue with updating the leaderboard for the puzzle generator after playing offline. The points earned offline were sometimes not being added to the leaderboard correctly. • Fixed an issue where the page of settings for the puzzle generator was sometimes missing from the settings popup. This was happening if the settings popup was brought up while a puzzle was in play. • If the squares between two blocks are selected using a swipe (drag) gesture, the selection can be inverted by tapping the corresponding clue value. This switches the selection from the squares inside the blocks to the squares outside the blocks. This was already possible before, but sometimes it would work with one tap, other times it took two. It now works consistently with just a single tap. • A haptic effect is no longer triggered when multiple squares are selected using a swipe (drag) gesture. • Some small cosmetic changes, including improvements to contrast ratios for the squares and numbers of a puzzle in play.
Play today's Sudoku puzzle
A quick 6×6 Sudoku every day; levels grow to the classic 9×9. A free daily puzzle from Fiplay, same board for everyone. It plays right here, no download.
App privacy
The developer, Jonathan Buchanan, reported these privacy practices to Apple.
Data Not Collected
The developer does not collect any data from this app.
Alternatives to Sumaddle
Looking for apps like Sumaddle? Here are 6 similar apps on the App Store. The highest rated is Minesweeper: Collector (4.8/5), and all 6 are free to download.
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| App | Rating | Price | Last updated | Compare |
|---|---|---|---|---|
| Sumaddle | 4.9 / 5 (769 ratings) | Free | September 17, 2026 | |
| Cracking the Cryptic | 4.4 / 5 (210) | Free | May 27, 2026 | Compare |
| Minesweeper: Collector | 4.8 / 5 (467) | Free | Apr 1, 2026 | Compare |
| Orixo | 4.7 / 5 (4,198) | Free | Jan 8, 2024 | Compare |
| Boy Howdy Logic Games | 4.7 / 5 (1,212) | Free | Jun 12, 2026 | Compare |
| Star Battle Hoshi Puzzles | 4.8 / 5 (268) | Free | Sep 15, 2026 | Compare |
| Nonogram Life | 4.8 / 5 (597) | Free | Feb 3, 2025 | Compare |
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