# Sudoku Rabbit vs ECHO

The clearest difference is rating: Sudoku Rabbit at 4.8 against ECHO's 4.0. Sudoku Rabbit also leads on ratings volume (36 vs 4). ECHO's advantage is in-app purchases (none vs 1) and ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Sudoku Rabbit sells 1 one-off in-app purchase. ECHO asks for nothing beyond the download.

Sudoku Rabbit holds the better App Store score, 4.8 against 4.0. That said, the two scores are not equally well evidenced: Sudoku Rabbit has 36 ratings behind it against 4, so its average is the more settled of the two.

Sudoku Rabbit ships an update fortnightly, ECHO every 3 days. The most recent releases landed on October 25, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | Sudoku Rabbit | ECHO |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (36 ratings)](https://appshunter.io/ios/app/sudoku-rabbit/id6742900571/reviews)** | [4.0 (4 ratings)](https://appshunter.io/ios/app/echo-time-loop-puzzle/id6791749935/reviews) |
| Number of ratings | **36** | 4 |
| Positive reviews | 68.4% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Fortnightly | **Every 3 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 81 MB | 3 MB |
| Requires iOS | **16.4** | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Zhun Wah Edward Lui](https://appshunter.io/developer/1800495090) | [Lucas Hesseldieck](https://appshunter.io/developer/6788079537) |

## What reviewers say

### Sudoku Rabbit

[App page](https://appshunter.io/ios/app/sudoku-rabbit/id6742900571)

Enjoy a seamless Sudoku experience with no un-skippable ads and a one-thumb-friendly design. Compete with friends in real-time, tackle daily challenges, and customize your gameplay with endless puzzles and fun options.

**Highlights:** Endless offline puzzles, Real-time competitive play, One-thumb controls, Daily challenges and rankings, Profile and gameplay customization, Dark theme and hardcore mode

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $7.99 | one-time |


### ECHO

[App page](https://appshunter.io/ios/app/echo-time-loop-puzzle/id6791749935)

This puzzle game challenges you to cooperate with recordings of your past actions. Solve intricate levels by coordinating with your "echoes" to overcome obstacles and complete complex sequences.

**Highlights:** Time-loop gameplay, 100 campaign levels, Daily puzzles, Endless Zen mode, Time challenge mode, Offline play, Live synthesized music

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Sudoku Rabbit free?

Sudoku Rabbit is free to download, with in-app purchases available.

### Is ECHO free?

ECHO is free to download, with no in-app purchases.

### Which has better reviews, Sudoku Rabbit or ECHO?

Sudoku Rabbit is rated higher. Sudoku Rabbit averages 4.8 out of 5 from 36 ratings, while ECHO averages 4.0 from 4 ratings.

### Do Sudoku Rabbit or ECHO have ads?

Sudoku Rabbit shows ads; ECHO does not.

### Which is updated more often, Sudoku Rabbit or ECHO?

Sudoku Rabbit ships an update fortnightly, and ECHO every 3 days. Most recently, Sudoku Rabbit was updated on October 25, 2026 and ECHO on October 22, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*