# Sudoku 21A — Sudokus with friends

> Free Sudoku app with single-player, multiplayer, and customizable aids. (iPhone/iPad app by David Barbero Carbonell.)

- Source: https://appshunter.io/ios/app/sudoku-21a/id1554695823 (this page in markdown: same URL + `.md`)
- Developer: [David Barbero Carbonell](https://appshunter.io/developer/1511168059)
- Category: Games, Puzzle, Strategy
- Price: Free
- Rating: 1.00/5 from 2 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 14.4 · 48 MB
- Languages: English
- Released: 2021-02-28
- Data updated: 2026-06-05
- Monetization: ad-supported
- User reviews in markdown: https://appshunter.io/ios/app/sudoku-21a/id1554695823/reviews.md

## What is Sudoku 21A?

Free Sudokus app where your brain capacities will be tested.

We offer you:

- Six levels of difficulty: Super easy, easy, medium, hard, insane and inhuman to fit your level.

- Two game modes:

     • Individual: You will compete against yourself to get the best time.

     • Multiplayer: You will compete online against a friend with the same sudoku to see who finishes first.

- Infinity of combinations so you do not get tired of playing.

- Clues in case you find it difficult to go on.

- Customization of features to enhance your experience.

- Smart aids such as notes, counting, auto-delete notes, warning of obvious errors and much more ...


Don’t think it twice. This is your app! Download it and tell your friends so that the experience is maximum.

## Key features

- Six difficulty levels
- Individual game mode
- Online multiplayer mode
- Infinite Sudoku combinations
- In-game clues
- Customizable features
- Smart aids

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/sudoku-21a/id1554695823/reviews.md

### 1/5 — Faulty

*2024-08-08*

Go to play click accept and juss won’t accept so can’t play it at all

**Developer response:** Hello, 
Thank you for the review.
We're really sorry for the bug. We have solved it so it should already work.
I wish you still enjoy our app from now on.

### 1/5 — Cannot use press continue after the privacy policy

*2023-12-09*

I would love to use this app, but for some reason when I press continue for the privacy policy a pop saying I must accept the consent of the privacy policy... which I did do but I cannot leave the screen no matter what I do. If this is fixed I would be happy to change my rating

**Developer response:** Hello, 
Thank you for the review.
We're really sorry for the bug. We have solved it so it should already work.
I wish you still enjoy our app from now on.

## Frequently asked questions about Sudoku 21A

### Does Sudoku 21A have ads?

Yes, Sudoku 21A contains advertisements. This is how the app remains free to download and play.

### What are the difficulty levels in Sudoku 21A?

Sudoku 21A offers six distinct difficulty levels: Super easy, easy, medium, hard, insane, and inhuman, catering to a wide range of player skills.

### Can I play Sudoku 21A offline?

The description focuses on online multiplayer and the availability of infinite combinations, suggesting that an internet connection may be required for full functionality, especially for the multiplayer mode.

### How does the multiplayer mode in Sudoku 21A work?

In the multiplayer mode, you compete online against a friend on an identical Sudoku puzzle. The goal is to see who can complete the puzzle first.

### What kind of smart aids are available in Sudoku 21A?

Sudoku 21A provides smart aids such as notes, counting, auto-delete notes, and warnings for obvious errors to help players during gameplay.

### What devices is Sudoku 21A available on?

Sudoku 21A is supported on iPhone, iPad, and iPod devices.

### How often is Sudoku 21A updated?

The app was last updated on August 13, 2024, indicating active development and maintenance.

### What is the age rating for Sudoku 21A?

Sudoku 21A has an age rating of 4+, making it suitable for a broad audience.

## Version history (last 5 releases)

### 1.0.12 — 2024-08-13

Fixed tutorial page

### 1.0.11 — 2023-12-05

Discover the latest enhancements and fixes in our new update!

### 1.0.10 — 2023-09-04

New animations

### 1.0.8 — 2022-05-03

Bugs fixed

### 1.0.5 — 2021-04-05

- Bugs fixed.
- Must have the latest version to play online mode.

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## More apps by David Barbero Carbonell

- [Friends O'Party](https://appshunter.io/ios/app/friends-oparty/id1511168060)
- [MTG Life Counter 21A](https://appshunter.io/ios/app/mtg-life-counter-21a/id6449148503)

All apps by David Barbero Carbonell: https://appshunter.io/developer/1511168059

## Related topics

[sudoku 21a](https://appshunter.io/ios/topics/sudoku-21a) · [david barbero carbonell](https://appshunter.io/ios/topics/david-barbero-carbonell)

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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 2026-06-05.*