# GridDuel: Sudoku & Friends — Play Solo or Challenge Friends

> Play Solo or Challenge Friends (iPhone/iPad app by David Prochazka.)

- Source: https://appshunter.io/ios/app/gridduel-sudoku-and-friends/id6808622297 (this page in markdown: same URL + `.md`)
- Developer: [David Prochazka](https://appshunter.io/developer/6808622299)
- Category: Games, Entertainment, Puzzle
- Price: Free
- Age rating: 4+
- Requires: iOS 17.0 · 2 MB
- Languages: American English, Czech
- Released: 2026-09-09
- Data updated: 2026-10-31

## What is GridDuel?

GridDuel is a clean and focused Sudoku game for solo play, daily puzzles, and friendly competition.

Create an Arena, choose a separate difficulty for each of its three rounds, and invite a friend through Game Center. Both players can solve the same puzzles at the same time and at their own pace. A friend's detailed result is revealed only after you finish the same round.

For a completely offline competition, create a classic challenge and share its short code. Entering the code generates the exact same Sudoku on both phones without a server.


WHAT YOU GET

• Five difficulty levels, from Beginner to Expert
• Three-round Game Center Arenas for two players
• A separate difficulty for every Arena round
• Simultaneous play with per-round and overall results
• Friend challenges using a short shareable code
• A daily Sudoku with the same puzzle for everyone
• Fully offline solo play
• Notes, erase, pause, and related-cell highlighting
• Three hints for every game
• Completed-game statistics and best score
• English and Czech based on your iPhone language

Speed is not the only thing that matters in a duel. Mistake penalties escalate from 30 to 60, 90, 180, and then 360 seconds, while every hint adds 60 seconds. The fastest accurate solver wins.

GridDuel requires no custom account. Solo games, daily puzzles, and code challenges work without internet access. Arenas require an internet connection and a Game Center account.

## Is GridDuel safe?

Not enough ratings yet to assess GridDuel.

## Is GridDuel legit?

GridDuel: Sudoku & Friends has limited verification signals. The AppsHunter Legitimacy Score for GridDuel is 58 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 2 releases)

### 1.2 — 2026-09-16

Landscape mode is here! Rotate your iPhone to play with the Sudoku grid and controls comfortably side by side. Your progress is preserved when switching orientations. This update also fixes a Game Center crash and improves overall stability.

### 1.1 — 2026-09-09

No release notes.

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## Related topics

[sudoku friends](https://appshunter.io/ios/topics/sudoku-friends)

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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 2026-10-31.*