Comparison

Killer Sudoku vs Extra+

Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.

Head to head
About

Killer Sudoku

This logic puzzle game combines elements of Sudoku and Kakuro. Fill the grid with numbers while ensuring the sum of numbers in designated cages matches the corner value. Offers multiple difficulty levels and game modes for all players.

Highlights
  • 80,000+ logic puzzles
  • 9 difficulty levels
  • Daily Challenge mode
  • Free hints
  • Auto-check for mistakes
  • Player rankings
  • Color themes
Features
Read full description

Killer sudoku (also named sumdoku, addoku, cross-sum or samunamupure) is a logical puzzle game that combines elements of sudoku and kakuro. So its rules are like the classic sudoku very much. Your goal is to fill the grid with numbers like in classic sudoku and also make sure the sum of numbers in cages (areas separated by dotted lines) is equal to the number in the upper left corner of that cage. If you are interested in playing number games or math puzzle games, this Killer Sudoku is exactly for you! Killer Sudoku may be a little bit harder than a classic sudoku puzzle game. But we offer 9 balanced difficulty levels for beginners and advanced players. Even you didn't play Killer Sudoku before, you'll become a Killer Sudoku master in no time. How to play it? The objective is to fill the grid with numbers from 1 to 9 in a way that the following conditions are met. 1. Each row, column and block contain each number exactly once. 2. The sum of all numbers in a cage must match the small number printed in its corner. 3. No number appears more than once in a cage. Main Features: 1. Include more than 80,000 puzzles, and all are tested by program. 2. Contain several game modes: Daily Challenge, Game Levels, Trophies Collection. 3. The game offers 9 difficulty levels that are suitable for both beginners and masters. 4. Use free hints when you are stuck. 5. Use auto-check to see the mistakes in real-time. 6. Take part in the ranking, and compete with other players. 7. Long press and lock a number, use for multiple cells, you can enable it in settings. More Features: - Color themes, select your favorite color. - Unlimited Undo. - Auto-save game and continue it next time. - Auto-notes for all the cells. - Statistics, record all your progress. - Timer, you can disable it in settings. - Support phone and tablets. Thanks for your selecting our Killer Sudoku game, please install it free, train your brain, and enjoy your happy time!

About

Extra+

Features
Read full description

Swipe to move the dice on the board to reach 2048! When two dice with the same number touch, they merge into one. Reach the Extra Joker die and keep playing to reach even higher! Dice Extra is a simple and satisfying puzzle game with a few smart twists to make every run more strategic, more flexible and more fun! Elegantly designed with colorful tiles, smooth controls and a clean, easy-to-read board, Dice Extra is made for quick sessions, long score chases and relaxing puzzle play. Features include: • Swipe anywhere to move tiles • Smooth, satisfying tile movement • Bright, colorful high-resolution graphics • Large, easy-to-read board • Personal best scores • See the next tile before it appears • New special tiles that add more variety • Wild Joker tiles that can merge with any number • Stone tiles that can be broken to reveal hidden numbers • Grab tiles that can trigger chain merges • x2 and x4 multiplier cells for bigger scores • Free to play Plan your moves, keep your board open and use the new mechanics at the right moment to push your score higher. Whether you want a quick puzzle break or a longer run toward your next best score, Dice Extra gives the classic merge puzzle a fresh, polished and rewarding upgrade. For support and answers to frequently asked questions, visit: https://www.99upgames.com

Screenshots

Killer Sudoku4 screens
Extra+4 screens

Verdict

The call

The clearest difference is in-app purchases: Killer Sudoku at none against Extra+'s 1. Killer Sudoku also leads on iOS requirement (13.0 vs 17.6). Extra+'s advantage is update cadence (every 10 days vs every 4 months). On price, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Extra+ sells 1 one-off in-app purchase. Killer Sudoku asks for nothing beyond the download.

UpkeepUpdate frequency

Killer Sudoku ships an update every 4 months, Extra+ every 10 days. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

Scorecard3 real differences · 7 level
Killer Sudoku versus Extra+: the parameters behind the verdict, then further details
ParameterKiller SudokuExtra+
PriceFreeFree
Rating4.8 (189 ratings) — better—
Positive reviews92.5% of reviews—
Number of ratings189 — better—
Update frequencyEvery 4 monthsEvery 10 days — better
AdsYesYes
In-app purchasesNo — betterYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better17.6
Further details — not scored
Size32 MB19 MB
Age rating4+4+
Developer俊杰 龚99 Up Games

Bugs and requests

Killer Sudoku

Reported bugs

5 issues
  • Errors in high-level games
  • Unplayable Czech translation
  • Dashed lines are too light
  • App does not rotate when charging
  • Forced errors due to invalid Sudokus

Requested features

11 requests
  • Slight color/design adjustments for legibility
  • Advertising close button on the edge
  • Auto-Complete feature
  • Ability to add multiple hints in one cross stroke
  • Make dotted lines bolder
Show 6 more
  • Alert when an incorrect number is placed
  • Level between medium and hard
  • Ability to play horizontally
  • Dark mode option
  • Cloud save/Google integration
  • Swipe to input numbers

Extra+

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Killer Sudoku

No in-app purchases

1 purchases

Extra+

One-time1
  • Remove Ads$4.99

Questions

Is Killer Sudoku free?
Killer Sudoku is free to download, with no in-app purchases.
Is Extra+ free?
Extra+ is free to download, with in-app purchases available.
Do Killer Sudoku or Extra+ have ads?
Both Killer Sudoku and Extra+ show ads.
Which is updated more often, Killer Sudoku or Extra+?
Killer Sudoku ships an update every 4 months, and Extra+ every 10 days. Most recently, Killer Sudoku was updated on November 3, 2026 and Extra+ on October 31, 2026.

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