Sudoku Exchange
Classic & row-swap puzzles
Free · Designed for iPad. Not verified for macOS.
Classic Sudoku and a different kind of daily puzzle: repair a full board by swapping numbers within each row. Play offline, keep a streak, and take your time.
Two ways to play, in one calm, offline puzzle app.
CLASSIC SUDOKU
Easy, Medium and Hard puzzles, each with exactly one solution. Number-first entry is the default: pick a number, then tap squares to place it. Prefer the other way round? Square-first is a setting. Pencil marks let you note candidates, Fill notes works out what is still allowed, and writing a number tidies the notes around it. Undo has your back.
SUDOKU EXCHANGE
A different way in. The board starts completely full, and every row is already correct. Swap two numbers within a row to repair the columns and boxes. Any valid Sudoku wins. Gold, silver and bronze medals reward an efficient repair.
A DAILY PUZZLE, AND A STREAK WORTH KEEPING
Everyone gets the same daily Exchange puzzle. Solve it to build a run of consecutive days. Every seventh solved day earns a rest day, held two at a time, so one busy day does not erase weeks of work. Your journal keeps current and longest runs, days played, medals and a 28-day ribbon. There is no currency and nothing to lose but the count.
MADE TO BE CALM
Three palettes: Signal, Blueprint and Print. An optional ambient soundtrack with its own volume, and gentle haptics. An optional daily reminder, off until you ask for it. Hide the timer if it puts you off your game.
YOURS, ON YOUR DEVICE
No account, no sign-in, no cloud saves. Puzzles are generated on your device, and your game, pencil marks, journal and best times all save locally. Plays completely offline.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Improved layouts keep game controls clear of advertisements and make better use of space on the home screen.
The developer, John Cotter, 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 Linked to You
The following data may be collected and linked to your identity:
- Location
- Identifiers
- Usage Data
- Diagnostics
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- John Cotter
- Size
- 36.7 MB
- Category
- Puzzle
- Compatibility
Requires iOS 16.4 or later.
- iPhone
Requires iOS 16.4 or later. - iPad
Requires iPadOS 16.4 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
18+
- 18+
- Contains
Advertising
- Copyright
- © 2026 John Cotter