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Sumaddle 4+
Logic puzzle
Jonathan Buchanan
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- Free
- Offers In-App Purchases
Screenshots
Description
A logic game for fans of challenging puzzles.
• "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 is, hands down, THE best logic game on the App Store”, US App Store review Mar 2023
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.
Useful to know: even though there are numbers involved, all puzzles can be solved with pure logic, no mental arithmetic is required.
So take your time and enjoy puzzling your way through more than 120 free puzzles, ranging all the way from easy to very difficult. If you get stuck or make a mistake, the built-in help will get you going again. The help explains the logical reasoning at each step, making it a great way to learn how to solve the puzzles. Use the help as much as you like, it’s also completely free. Yet even with so much free content, you won’t be bothered by ads - Sumaddle is completely ad-free!
What’s New
Version 1.62.1
Improvements in the area of puzzle packs and some changes to the way the number buttons work. The changes in detail:
• Puzzle packs can now be reset individually, instead of all packs in the same category having to be reset together. The menu option “reset puzzle packs” brings up a dialog in which the packs to be reset can be selected freely.
• When playing the puzzles in puzzle packs, the way that the next puzzle is selected has been changed. It now works more sequentially, always proceeding forwards where possible. When all puzzles in a pack have been solved, the search proceeds forwards to the next available puzzle pack, instead of jumping back to the first pack.
• When a puzzle in a puzzle pack is paused, the page with the button for continuing play now includes a new button to “skip to next puzzle”. This provides a more convenient way to proceed to the next puzzle in a pack, rather than having to go back to the overview of puzzles and selecting the next puzzle manually.
• The way the number buttons switch between being active or inactive has been changed. The buttons are now only active for the numbers that are still considered to be candidates, they are inactive for numbers that have already been eliminated. This helps to prevent numbers from being mistakenly re-added to a square, or to a group of squares. It also makes it easier to see which combinations fit a group of squares that have been selected together.
• Depending on playing strategy, some players may prefer to have the number buttons working as they did before. The setting “tie number buttons to narrowed candidates” makes it possible to choose, whether the buttons work in the new or old way. This new setting can be found in the settings section for “optional features”, it is on by default (= new way of working).
• When a single square is selected and the candidate values are updated by tapping the number buttons, values that are eliminated are now highlighted with orange/pink. This is consistent with the way the numbers are highlighted when multiple squares are selected and operated on together.
• When a single square is selected and pencil mode is active, the number buttons no longer appear with orange highlighting for all buttons. Instead, the buttons use the same highlighting as when pencil mode is not active.
• Added dark and tinted app icons for iOS 18 / iPadOS 18.
• Added some measures that might help to prevent the Game Center icon from being shown at the wrong time when the app is brought back into action after having been suspended for a while.
• Some corrections have been made to the way that candidate values are restored to related squares when the selected square (or group of squares) is cleared by tapping repeatedly, or by tapping the clear button.
Version 1.62.1 includes some additional fixes:
• When a 9x9 puzzle with pre-filled blocks is reset, the pre-filled blocks should not be cleared.
• When the setting “Show if numbers add up correctly to the clue values” is turned off, there should be no sound or haptic feedback when numbers do not add up correctly.
• When the setting “Show if numbers add up correctly to the clue values” is turned on and multiple squares have been selected together, checks on numbers adding up correctly are suspended while the selection is still active. This will help to prevent false alarms of an incorrect sum when players choose to tap in candidate numbers one by one, instead of eliminating numbers using double tap.
Ratings and Reviews
Perfect!
Love this game. Challenging, with no hand holding unless you ask for it. Hint system is great. My only wish is that the random play had a very-difficult only option.
Developer Response ,
Thanks One:27Co!😄 Your feedback about a very-difficult-only option is interesting. Will aim to provide some kind of way to give more control over the difficulty level in a future release!
UPDATE: I’m pleased to let you know that a new setting for Random Play has been introduced in version 1.31.0 which makes it possible to have harder (or easier) puzzles generated more often. If you are running in Expert play mode then the larger puzzles will be Very Difficult most of the time, and if you allow sum values to be hidden then it is possible for 5x5 puzzles to reach Very Difficult too. I hope the new setting is close to what you were looking for!
Good puzzle game
I like it. Reminds me of sudoku, but a bit harder
Really good game
I love this game, the only thing I don’t like that is you can’t play again the same game.
Developer Response ,
Hi Vrus25 and thank you for your positive review! You may be pleased to hear that all the puzzles in the Challenge Trail and Puzzle Sets can in fact be played again (and again, as many times as you like). The option to reset the puzzles can be found in the options menu, top right of screen in these sections.
If you're looking to replay the same puzzle that you only just played then you can always choose to clear it by tapping the reset button (with the X) instead of tapping the button with the chequered flag. It might also be useful to turn on the option in the settings to "show if sums add up correctly", which will let you see if the solution is looking good before you clear it.
The reason why there is no other simple way to replay the same puzzle immediately is because it would make it too easy to climb the leaderboard if players could go back and get a better score for the puzzle they just learnt how to solve.
Hope that all makes sense and you continue to enjoy the app.
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, for example, based on the features you use or your age. Learn More
Information
- Seller
- Jonathan Buchanan
- Size
- 24.4 MB
- Category
- Games
- Compatibility
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- 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
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- Puzzle Generator $12.99
- Tricky, Pack 1 $0.99
- Tricky, Pack 2 $0.99
- Tricky, Pack 3 $0.99
- Sneaky, Pack 1 $0.99
- Crafty, Pack 1 $0.99
- Sneaky, Pack 2 $0.99
- Sneaky, Pack 3 $0.99
- Assorted Puzzles $0.99
- Crafty, Pack 2 $0.99
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.