SumSudoku: Killer Sudoku is a puzzle app developed by Conceptis Ltd..
How many times has SumSudoku: Killer Sudoku been downloaded?
SumSudoku: Killer Sudoku has been downloaded 180 thousand times. In the last 30 days, the app was downloaded 1.5 thousand times.
What is the rating of SumSudoku: Killer Sudoku?
SumSudoku: Killer Sudoku is rated 4.57 out of 5 stars, based on 2.9 thousand ratings.
Is SumSudoku: Killer Sudoku free?
SumSudoku: Killer Sudoku is free to download. The APK download size is 22.34 MB. The latest version available is 3.2.0. The last update was on February 19, 2026.
What are the requirements for SumSudoku: Killer Sudoku?
SumSudoku: Killer Sudoku requires Android 5.0+ or higher. The app has a content rating of Everyone. The app has been available on Google Play July 2018.
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 (tablet only) • Track puzzle solving times • Backup & restore puzzle progress to Google Drive
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.
Recent changes: This version improves performance and stability.
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Lovely app, horrible graphics. When a box is highlighted, the 'bold' lines do not allow seeing how many cells in the sum. Concepts have other SUDOKU puzzles whose graphics are great.
★★★★★Becca Baldwin· Jun 13, 2024
My favorite killer sudoku app! I love how it shows you the possible umber combinations for each section, and allowing me to cross out combos that I know won't work. Only thing I wish was that it would have daily puzzles with a streak tracker, and something to show how I compare to other players on each puzzle. Adding events would also make sure I log in daily! Oh, and please allow us to customize our colors 😭 yellow on beige is sooo hard to see
★★★★★Eric Cutright· Jul 25, 2023
Great killer sudoku puzzles! I only wish the number input controls could be switched to input by number instead of input by cell, other than that the game is great.
★☆☆☆☆Alexander Massey· Jul 20, 2025
Some of the killer puzzles are impossible to solve without hints. It ruins the game. I don't want to risk running into another impossible puzzle, so I won't be playing this anymore. It was fun until then
★★☆☆☆Steve Rusnak· Sep 21, 2024
UI is unbearable Edit for clarity: numbers aren't in a straight line, poor contrast. If it's just a setting, then ok the default is not good imo
★☆☆☆☆Alexander Massey· Feb 11, 2025
My hard puzzle wasn't reset this week. All the other puzzles were reset when I hit the reset button. But my hard puzzle stayed completed. Edit to reply: No, that is not what I'm saying. I didn't get a new weekly hard puzzle. It stayed the same puzzle as the previous week.
★★☆☆☆K Carter· Nov 26, 2025
Love this game, but would like the option of a hint on the Killers without requiring autofill. When I've already eliminated most of the extraneous possibilities. Why can't a hint take me from that point, instead of having to repeat every option? When I already have the squares marked manually with everything but what I have already logically eliminated, there should be the possibility of a hint based on my current markings, instead of repeating the obvious & please provide further Explanations!
Google Play Rankings for SumSudoku: Killer Sudoku
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Technologies used by SumSudoku: Killer Sudoku
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