Comparison

Killer Sudoku vs PitaBlock 5x5

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

PitaBlock 5x5

Features
Read full description

PitaBlock 5x5 is a simple, satisfying puzzle where you fit pieces perfectly on a 5×5 board. Enjoy intuitive drag & drop with magnetic snapping and cell highlighting so you always know where a piece can go. Arrange pieces freely off the board, too. Stuck? Watch a short ad to reveal up to 3 color‑coded, numbered hints. Features • 30 handcrafted stages with increasing challenge • Great feel: drag & drop, magnetic snap, clear highlights • Free arrangement in the off‑board area • Hint system: watch an ad to reveal up to 3 placements (color‑coded & numbered) • Audio & haptics for satisfying feedback • Stage select & progress; resume from cleared stages • Offline friendly (ads/hints require network) How to Play 1. Drag a piece toward the board 2. It snaps when aligned; target cells highlight 3. Fill all cells to clear the stage Great for • Quick sessions with crisp, tactile gameplay • Fans of logic and block‑fitting puzzles • Anyone who enjoys a clean, minimal puzzle experience

Screenshots

Killer Sudoku4 screens
PitaBlock 5x54 screens

Verdict

The call

The clearest difference is update cadence: PitaBlock 5x5 at daily against Killer Sudoku's every 4 months. Killer Sudoku's advantage is iOS requirement (13.0 vs 18.1). On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Killer Sudoku ships an update every 4 months, PitaBlock 5x5 daily. The most recent releases landed on September 17, 2026 and February 1, 2026 respectively.

Scorecard2 real differences · 8 level
Killer Sudoku versus PitaBlock 5x5: the parameters behind the verdict, then further details
ParameterKiller SudokuPitaBlock 5x5
PriceFreeFree
Rating4.8 (182 ratings) — better—
Positive reviews92.5% of reviews—
Number of ratings182 — better—
Update frequencyEvery 4 monthsDaily — better
AdsYesYes
In-app purchasesNoNo
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better18.1
Further details — not scored
Size32 MB62 MB
Age rating4+4+
Developer俊杰 龚Mamiko Tsukamoto

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

PitaBlock 5x5

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Killer Sudoku

No in-app purchases

None

PitaBlock 5x5

No in-app purchases

Questions

Is Killer Sudoku free?
Killer Sudoku is free to download, with no in-app purchases.
Is PitaBlock 5x5 free?
PitaBlock 5x5 is free to download, with no in-app purchases.
Do Killer Sudoku or PitaBlock 5x5 have ads?
Both Killer Sudoku and PitaBlock 5x5 show ads.
Which is updated more often, Killer Sudoku or PitaBlock 5x5?
Killer Sudoku ships an update every 4 months, and PitaBlock 5x5 daily. Most recently, Killer Sudoku was updated on September 17, 2026 and PitaBlock 5x5 on February 1, 2026.

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