Sumaddle is made and published by Jonathan Buchanan. AppBrain is an independent app data site and isn't affiliated with Jonathan Buchanan. The app name, icon, screenshots and description belong to Jonathan Buchanan and are shown as published on the App Store.
AppBrain's verdict
EstablishedLoved by users- Rating on App Store
- 4.90
- 769 ratings
- Last updated
- September 17, 2026
Users love it: 4.9 stars from 769 ratings.
Rankings
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Similar apps and more from Jonathan BuchananAlternatives to Sumaddle
Releases
Updates seen on the App Store- Version
- 2.10.0
- Launched
- February 2021
No changelog data
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Technology
Found in the app by AppBrain- Price
- Free
- App size
- 30.2 MB
- Content rating
- Everyone
Technologies used by Sumaddle
About the app and developer
About Sumaddle
Sumaddle is a games app developed by Jonathan Buchanan.
User Ratings
Sumaddle is rated 4.90 out of 5 stars. The rating is based on 770 ratings.
App Information
Sumaddle is freely available from the App Store. The app size is 30.24 MB. The latest version available is 2.10.0. The last update was on September 17, 2026.
Technical Requirements
The app has a content rating of Everyone. The app has been available on the App Store since February 2021.
Developer information for Jonathan Buchanan
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Store listing
By Jonathan Buchanan, from the App Store
Description by Jonathan Buchanan Written by the developer, not by AppBrain. Click to read.
• “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