Sumaddle 4+
Logic puzzle
Jonathan Buchanan
-
- Free
- Offers In-App Purchases
Screenshots
Description
A logic game for keen puzzlers, ad-free!
• “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 logic 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 120 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 and can be used as much as you like
• works offline (ideal for long journeys)
• a high standard of accessibility, including comprehensive support for VoiceOver
• ad-free play - there are absolutely no ads!
What’s New
Version 1.64.2
The Challenge Trail has some new puzzles! Details of this and other changes:
• The free puzzles in the Challenge Trail have been updated. Most of the puzzles in the harder levels have been replaced with new puzzles that reflect the difficulty ratings more accurately. In the easier levels, some 4x4 puzzles are now featured. In total, there are more puzzles to play than before.
• When the puzzle generator is configured with different weights for the different categories of puzzle difficulty, the puzzles are now generated with a better mix of difficulties.
• When a square has no candidate values left, a yellow warning symbol is shown, instead of a plain empty square. When this happens, it usually means there is a mistake somewhere. A quick way to fix mistakes is to use the built-in help.
Version 1.64.2 also includes a correction to the way points are awarded for solving a puzzle.
App Privacy
The developer, Jonathan Buchanan, 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 Collected
The developer does not collect any data from this app.
Privacy practices may vary based on, for example, the features you use or your age. Learn More
Information
- Provider
- Jonathan Buchanan
- Size
- 25 MB
- Category
- Games
- Compatibility
-
- iPhone
- Requires iOS 15.0 or later.
- iPad
- Requires iPadOS 15.0 or later.
- iPod touch
- Requires iOS 15.0 or later.
- Languages
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English, German
- Age Rating
- 4+
- Copyright
- © 2021-2025 Jonathan Buchanan
- Price
- Free
- In-App Purchases
-
- Premium 9x9 Puzzles, Pack 2 USD 0.99
- Quirky, Pack 5 USD 0.99
- Quirky, Pack 4 USD 0.99
- Very Difficult Puzzles USD 0.99
- Quirky, Pack 3 USD 0.99
- Premium 9x9 Puzzles, Pack 1 USD 0.99
- Quirky, Pack 2 USD 0.99
- Quirky, Pack 1 USD 0.99
- Assorted Puzzles USD 0.99
- Puzzle Generator USD 11.99
Supports
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Game Center
Challenge friends and check leaderboards and achievements.
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Family Sharing
Some in‑app purchases, including subscriptions, may be shareable with your family group when Family Sharing is enabled.