SumSudoku: Killer Sudoku 4+
Crossovers with Kakuro flavor
Conceptis Ltd.
-
- Free
- Offers In-App Purchases
Screenshots
Description
Play a crossover variation of Sudoku and Kakuro! SumSudoku, also known as Killer Sudoku, are addictive logic puzzles best described as a cross between Sudoku and Kakuro. Using pure logic and simple add/subtract calculations, these fascinating puzzles offer endless fun and intellectual entertainment to puzzle fans of all skills and ages.
Each puzzle consists of a 9x9 Sudoku grid containing areas surrounded by dark borders. The object is to fill all empty squares so that the numbers 1 to 9 appear exactly once in each row, column and 3x3 box, and the sum of the numbers in each area is equal to the clue in the area's top-left corner. In addition, no number may be used in the same area more than once.
The game includes helpful features such as showing possible sum number combinations in an area and pencilmarks to make temporary placement of numbers in the grid. To help see the puzzle progress, graphic previews in the puzzle list show the progress of all puzzles in a volume as they are being solved. A Gallery view option provides these previews in a larger format.
For more fun, SumSudoku contains no ads and includes a Weekly Bonus section providing an extra free puzzle each week.
PUZZLE FEATURES
• 120 free SumSudoku puzzle samples
• Extra bonus puzzle published free each week
• Multiple difficulty levels from easy to very hard
• Puzzle library continuously updates with new content
• Manually selected, top quality puzzles
• Unique solution for each puzzle
• Hours of intellectual challenge and fun
• Sharpens logic and improves cognitive skills
GAMING FEATURES
• No ads
• Unlimited check puzzle
• Unlimited hints
• Show conflicts during gameplay
• Unlimited Undo and Redo
• Show possible sum combinations option
• Pencilmarks feature for solving hard puzzles
• Autofill pencilmarks mode
• Highlight Excluded Squares option
• Lock number on keypad option
• Concurrently playing and saving multiple puzzles
• Puzzle filtering, sorting and archiving options
• Dark Mode support
• Graphic previews showing puzzles progress as they are being solved
• Portrait and landscape screen support (iPad only)
• Track puzzle solving times
• Backup & restore puzzle progress to iCloud
ABOUT
Conceptis SumSudoku have also become popular under other names such as Killer Sudoku, Sumdoku and Sumoku. All puzzles in this app are produced by Conceptis Ltd. - the leading supplier of logic puzzles to printed and electronic gaming media all over the world. On average, more than 20 million Conceptis puzzles are solved each day in newspapers, magazines, books and online as well as on smartphones and tablets across the world.
What’s New
Version 2.7
This version improves performance and stability.
Ratings and Reviews
Challenging and absorbing
I have found this truly absorbing, time flies as I try to solve these puzzles and although they are challenging I am finding that over time I’m getting a little quicker and I am now progressing into the middle difficulty. If I use the magic wand to show all opportunities it is a lot easier but maybe not as rewarding.
Assistant Feature not always helpful
I’ve been using this app for some time, and have always found it very good. The new Assistant feature is a useful addition if you are really stuck, but it relies on you using the Auto-fill feature. If I have carefully filled in the possibilities in small digits, then get stuck and turn on Auto-fill, it will sometimes add additional “possibilities”, that I have already deduced are “impossibilities”. e.g. If I know that the number 1 can only be in row 3 within a certain cell, Auto-fill will add the number 1 to row 3 in other cells on that level, if there are no other constraints … do I then need to remove them again manually! (This bug also exists in the Auto-fill feature in Multi-Sudoku)
Updated 28 March 2023.
Thanks for the feedback on my previous comments!
My next comment is that I wish there was a “help” feature for the different types of hint the Assistant produces. Most I understand … but e.g. for “Sum Area Combinations” I wish it could step me through how it arrived at the conclusion, so I can learn for myself to apply that next time.
Developer Response ,
Thank you for your feedback, and for the point you are bringing up about auto-filling pencilmarks when using the Assistant. Your point is valid, but it was necessary to make this compromise to avoid complications and ambiguities in the way the Assistant works. To workaround this issue you have the following options:
* Don't use the Assistant at all, or
* Turn on Autofill Pencilmarks right when starting to solve a puzzle, or
* Continue using Assistant the same way but "going back" with the Undo button after seeing the hint.
We understand none of these options is ideal, but we still hope this is better than no Assistant at all.
Love it!
I love this app. I find it a real stress reliever.
Thanks for fixing the issue with the options not greying out.
And the new feature with the options and being able cross them out is brilliant. Thank you.
Developer Response ,
The issue you mention (greying-out numbers that are already set) was caused by a bug in Apple's iOS 14. We have a fix which will be released in the next update.
App Privacy
The developer, Conceptis Ltd., 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 Linked to You
The following data may be collected but it is not linked to your identity:
- Identifiers
- Usage Data
Privacy practices may vary based on, for example, the features you use or your age. Learn More
Information
- Provider
- Conceptis Ltd.
- Size
- 19.8 MB
- Category
- Games
- Compatibility
-
- iPhone
- Requires iOS 12.0 or later.
- iPad
- Requires iPadOS 12.0 or later.
- iPod touch
- Requires iOS 12.0 or later.
- Apple Vision
- Requires visionOS 1.0 or later.
- Languages
-
English, Japanese, Korean, Simplified Chinese
- Age Rating
- 4+
- Copyright
- © Conceptis Ltd.
- Price
- Free
- In-App Purchases
-
- Killer 1 £1.99
- Hard 1 £1.99
- Hard 2 £1.99
- Hard 23 £1.99
- Medium 1 £1.99
- Easy 1 £0.99
- Killer 2 £1.99
- Medium 2 £1.99
- Hard 65 £1.99
- Hard 3 £1.99
Supports
-
Family Sharing
Some in‑app purchases, including subscriptions, may be shareable with your family group when Family Sharing is enabled.