# Sudoku World: Friend Challenge — Daily Classic & Killer Puzzles

> Classic Sudoku puzzles with multiple difficulty levels and brain training features. (iPhone/iPad app by VINDecoded LLC.)

- Source: https://appshunter.io/ios/app/sudoku-world-friend-challenge/id1544613828 (this page in markdown: same URL + `.md`)
- Developer: [VINDecoded LLC](https://appshunter.io/developer/1191483514)
- Category: Games, Board, Puzzle
- Price: Free
- Rating: 5.00/5 from 6 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 16.0 · 20 MB
- Languages: American English
- Released: 2020-12-14
- Data updated: 2026-09-02
- Monetization: ad-supported
- User reviews in markdown: https://appshunter.io/ios/app/sudoku-world-friend-challenge/id1544613828/reviews.md

## What is Sudoku World?

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.

## Key features

- Thousands of classic Sudoku puzzles
- Four difficulty levels
- Daily Sudoku challenges
- Hints and auto-check
- Notes feature
- Offline play
- Progress statistics

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/sudoku-world-friend-challenge/id1544613828/reviews.md

### 5/5 — My favorite sudoku app!!

*2021-01-30*

I’ve tried several and this is my favorite!!

### 5/5 — Nice layout

*2021-01-10*

Love the layout of the game. The stats page is cool. Love the note feature for when i need to remember possibilities

**Developer response:** Thanks!  Still looking to add more features!

## Frequently asked questions about Sudoku World

### Does Sudoku World have ads?

Yes, Sudoku World contains advertisements. These ads help support the development and free availability of the game.

### How many puzzles are available in Sudoku World?

Sudoku World offers over 10,000 classic Sudoku puzzles across four difficulty levels: easy, medium, hard, and expert.

### Can I play Sudoku World offline?

Yes, Sudoku World is available to play offline, allowing you to enjoy puzzles anywhere, anytime without an internet connection.

### What difficulty levels does Sudoku World offer?

Sudoku World provides four perfectly balanced difficulty levels: easy, medium, hard, and expert, catering to both beginners and advanced players.

### Does Sudoku World track my progress?

Yes, Sudoku World includes a statistics feature to track your progress for each difficulty level, analyzing your best times and other achievements.

### What are the helper features in Sudoku World?

Sudoku World includes helpful features such as hints to guide you when stuck, an auto-check option to identify mistakes, and a notes feature for jotting down possibilities.

### What is the age rating for Sudoku World?

Sudoku World has an age rating of 4+, making it suitable for a wide range of players.

### How often is Sudoku World updated?

The latest version of Sudoku World is 2.66, and it was last updated on February 11, 2021. Updates typically bring new puzzles and feature improvements.

## Version history (last 5 releases)

### 2.71 — 2026-08-28

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.

### 2.70 — 2026-08-21

new game modes!

### 2.66 — 2021-02-11

Now with ranked games for all games!

### 2.63 — 2021-02-09

Now with more daily games!

### 2.5 — 2021-02-04

improved Puzzles!

## Apps similar to Sudoku World

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Sudoku Color - Classic Puzzle!](https://appshunter.io/ios/app/sudoku-color-classic-puzzle/id1503221765) | 4.8 (34,525) | Free | Games |
| [Killer Sudoku - Puzzle Games](https://appshunter.io/ios/app/killer-sudoku-puzzle-games/id1549645019) | 4.8 (6,198) | Free | Games |
| [Sudoku by Staple Games](https://appshunter.io/ios/app/sudoku-by-staple-games/id1561193287) | 4.8 (102,952) | Free | Games |
| [Killer Sudoku - number game](https://appshunter.io/ios/app/killer-sudoku-number-game/id1576305047) | 4.8 (182) | Free | Games |
| [Sudoku World - Brainstorming!!](https://appshunter.io/ios/app/sudoku-world-brainstorming/id463419280) | 4.7 (1,493) | Free | Games |
| [Sudoku Puzzle World](https://appshunter.io/ios/app/sudoku-puzzle-world/id834107022) | 4.8 (19,733) | Free | Games |

## More apps by VINDecoded LLC

- [VIN Check Report for Used Cars](https://appshunter.io/ios/app/vin-check-report-for-used-cars/id1191483515)
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- [Car Loan Calculator + Estimate](https://appshunter.io/ios/app/car-loan-calculator-plus-estimate/id1452004408)

All apps by VINDecoded LLC: https://appshunter.io/developer/1191483514

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-02.*