Comparison

Chess Peace vs SudokuOS

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

Head to head
About

Chess Peace

Engage in a peaceful, ad-free chess puzzle experience offline. No prior chess knowledge is needed to enjoy thousands of daily challenges and five unique puzzle modes. Customize your gameplay and track progress with detailed statistics.

Highlights
  • Offline play with no ads
  • Thousands of unique puzzles
  • Daily puzzle challenges
  • Five distinct puzzle modes
  • Extensive customization options
  • iCloud sync for progress
  • Home & Lock Screen Widgets
Features
Read full description

• A peaceful chess puzzle, played offline with no ads or account • No chess knowledge required — a new challenge for grandmasters and beginners alike • Thousands of puzzles plus a free Daily Puzzle every day • Available on iPhone, iPad & Mac, with your progress & settings synced via iCloud With over 26,500 unique puzzles across three difficulties and five different puzzle types, and a new Daily Puzzle every day, you play with just the board and six piece types — King, Queen, Rook (Castle), Bishop, Knight and Pawn — to find each satisfying solution. -- Daily Puzzles -- Build your streak by playing a new Daily Puzzle every day, share with other players via our Wordle-style solve grid, as well as a customised image showing the puzzle alongside the stats of your solve. -- Five Unique Puzzle Modes -- • Classic: One of each piece, one board, no captures. • Multiples: Some pieces are copies of each other. Same rule applies: no captures, only peace. • Two-Colour: White and black pieces share the board. Pieces only threaten the opposing colour. • Islands: Two boards, one puzzle. Only the Knight can jump the gap. • Presets: Some positions are revealed, but the pieces remain unknown. -- Find Your Zen through endless customisation -- Unprecedented personal customisation of the gameplay screen and menus, including subtly animated backgrounds, on/off toggles for nearly every visual element, and three distinct sets of gameplay sounds. Find your own Chess Peace in every puzzle, with customisation synced across devices. Also choose from many app-wide colour themes, board styles, and over 30 alternate app icons. -- Great chess learning tool, with no experience required -- If you’re not a chess player, don’t worry — Chess Peace teaches you everything you need to know, with a quick refresher on hand whenever you need it, as well as an optional possible moves system that shows every move possible by any piece on the board. -- Complete play history & in-depth statistics -- Replay your every solve move-by-move, and track your progress with granular statistics. Not your thing? Hide them using Zen and never seem them again. -- No data connection or account -- Everything is stored inside the app, with no connection required and no data collected. Your progress is synced via iCloud, available only to you. -- Home & Lock Screen Widgets -- Add some Chess Peace to your home and lock screens and jump straight into your next puzzle, or keep up your Daily Puzzle streak. -- Accessibility -- As well as supporting iOS Accessibility options, several additional accessibility features make Chess Peace as inclusive as possible, including colourblind mode, high contrast, bold icons, letters instead of piece icons, large text, reduced motion, and adaptable controls that can be brought to the top or bottom of the screen.

About

SudokuOS

Solve Sudoku puzzles with five difficulty levels on your iPhone or iPad. Utilize notes, candidates, hints, and an erase function. Track your progress with ratings and charts, and enjoy automatic saving for uninterrupted gameplay.

Highlights
  • Five difficulty levels
  • Notes and candidate filling
  • Hint and erase functions
  • Progress tracking and rating
  • Automatic game saving
  • Customizable accent colors and haptics
Features
Read full description

Play Sudoku on your iPhone or iPad. Choose from five difficulty levels and solve each puzzle at your own pace. Use notes, fill in candidates for individual cells, get help from a hint or erase an entry. After completing a puzzle, view your rating and progress chart. Settings shows your solved puzzle count and best time. Your current game is saved automatically on your device, so you can close the app and continue later. Choose from six accent colours and adjust the haptic feedback setting. No internet connection or account is needed to play. The app contains no ads, in-app purchases or subscriptions.

Screenshots

Chess Peace4 screens
SudokuOS4 screens

Verdict

The call

The clearest difference is in-app purchases: SudokuOS at none against Chess Peace's 2. SudokuOS also leads on update cadence (every 4 days vs fortnightly). Chess Peace's advantage is review sentiment (89% vs 71%). On price, ads, monetization model 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. Chess Peace sells 2 one-off in-app purchases. SudokuOS asks for nothing beyond the download.

UpkeepUpdate frequency

Chess Peace ships an update fortnightly, SudokuOS every 4 days. The most recent releases landed on November 9, 2026 and November 8, 2026 respectively.

Scorecard3 real differences · 7 level
Chess Peace versus SudokuOS: the parameters behind the verdict, then further details
ParameterChess PeaceSudokuOS
PriceFreeFree
Rating4.9 (142 ratings) — better—
Positive reviews89.1% of reviews — better71.4% of reviews
Number of ratings142 — better—
Update frequencyFortnightlyEvery 4 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreeFree
DevicesiPhone, iPad, Mac — betteriPhone, iPad
Requires iOS17.0 — better18.0
Further details — not scored
Size185 MB10 MB
Age rating4+4+
DeveloperSam ShepherdSeidelapps

Customer experience

Chess Peace

All ratings142 ratings
Positive98.6%
Neutral0.0%
Negative1.4%
Written reviews46 reviews
Positive89.1%
Neutral0.0%
Negative10.9%

SudokuOS

Written reviews7 reviews
Positive71.4%
Neutral28.6%
Negative0.0%

In-app purchases

2 purchases

Chess Peace

One-time2
  • Premium Unlock$8.99
  • Premium Unlock$11.99
None

SudokuOS

No in-app purchases

Questions

Is Chess Peace free?
Chess Peace is free to download, with in-app purchases available.
Is SudokuOS free?
SudokuOS is free to download, with no in-app purchases.
Do Chess Peace or SudokuOS have ads?
Neither Chess Peace nor SudokuOS shows ads.
Which is updated more often, Chess Peace or SudokuOS?
Chess Peace ships an update fortnightly, and SudokuOS every 4 days. Most recently, Chess Peace was updated on November 9, 2026 and SudokuOS on November 8, 2026.

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