Sudoku World: Friend Challenge
Daily Classic & Killer Puzzles
Free · Designed for iPad. Not verified for macOS.
Same Sudoku. Same rules. Challenge a friend, race their private ghost, and compare results—then build your Daily streak across Classic and Killer puzzles.
Same Sudoku. Same rules. Different solver.
Sudoku World turns a timeless logic puzzle into a fair friend challenge. Finish a board, share a link, and let a friend play the same Classic or Killer Sudoku on their schedule. Compare score, time, mistakes, and hints—no public profile required.
FRIEND CHALLENGES BUILT FOR REAL LIFE
• Share one link; your friend has seven days to play
• Choose whether teaching hints are allowed
• Play with no mistake cap or a three-mistake limit
• Compare both results under the same scoring rules
• Rematch when you are ready
RACE A PRIVATE GHOST
Turn on Ghost Race to see the challenger’s recorded pace move across the board. It shares cell locations and timing only—never entered numbers or private notes. The final result stays hidden until the puzzle is finished.
DAILY PUZZLES AND WORLD JOURNEY
Build a Daily streak with fresh Classic and Killer boards, or catch up on the previous six days. First wins earn Journey points that unlock eight destination-inspired themes. On iOS, compare World Journey Points and unlock milestones through Game Center.
12,000+ INCLUDED PUZZLES
Choose Fast, Easy, Medium, Hard, or Expert Classic Sudoku, plus Killer Sudoku from Easy through Expert. Included boards remain available offline; friend challenges, sync, and Journey awards require a connection.
TOOLS THAT HELP YOU LEARN
• Pencil notes, unlimited undo, and auto-save
• Teaching hints that explain the next logical step
• Optional auto-check and duplicate highlighting
• Light, dark, high-contrast, and large-control modes
• Personal statistics, best times, and progress
BUILT FOR FOCUS
Play as a guest, or use Sign in with Apple to sync supported progress. No full-screen ad appears while a puzzle is in progress. If you choose to delete your account, you can do it directly from Settings and start fresh.
Whether you are protecting a Daily streak, learning a new technique, or settling a friendly rematch, Sudoku World gives every solve somewhere to go.
Sudoku World has a fresh look and new ways to play together.
• Challenge a friend on the same Classic or Killer board.
• Race a private ghost that shares pace, never numbers or notes.
• Explore World Journey, compare Journey Points, and unlock Game Center achievements.
• Discover redesigned Today, Play, and Progress experiences.
• Manage privacy choices and delete your account from Settings.
The developer, VINDecoded LLC, 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 Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Location
- Identifiers
- Usage Data
- Diagnostics
Data Linked to You
The following data may be collected and linked to your identity:
- Location
- Contact Info
- User Content
- 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
- VINDecoded LLC
- Size
- 20.6 MB
- Category
- Board
- Compatibility
Requires iOS 16.0 or later.
- iPhone
Requires iOS 16.0 or later. - iPad
Requires iPadOS 16.0 or later. - Mac
Requires macOS 13.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 VINDecoded LLC
