# Sudoku vs ECHO LOOP

The clearest difference is ads: Sudoku at none against ECHO LOOP's shown. ECHO LOOP's advantage is update cadence (every 3 days vs every 3 weeks). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Sudoku ships an update every 3 weeks, ECHO LOOP every 3 days. The most recent releases landed on October 29, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Sudoku | ECHO LOOP |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (80 ratings)](https://appshunter.io/ios/app/sudoku-no-ads-unlimited/id6757938217/reviews)** | — |
| Number of ratings | **80** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | **Every 3 days** |
| Monetization | Free | — |
| Size | 8 MB | 5 MB |
| Requires iOS | 18.6 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Edvin Linden](https://appshunter.io/developer/1472363182) | [RYO TAKENO](https://appshunter.io/developer/6791367948) |

## What reviewers say

### Sudoku

[App page](https://appshunter.io/ios/app/sudoku-no-ads-unlimited/id6757938217)

This game offers a pure Sudoku experience with no ads or internet required. It features five difficulty levels, smart notes, and error highlighting to help you train your brain. Track your progress with detailed statistics and enjoy a satisfying haptic feedback experience.

**Highlights:** No ads or internet needed, Five difficulty levels, Smart notes and error highlighting, Detailed statistics, Offline play, Haptic feedback

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

**In-app purchases:** none


### ECHO LOOP

[App page](https://appshunter.io/ios/app/echo-loop-time-loop-puzzle/id6791367946)

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

**In-app purchases:** none


## Frequently asked questions

### Is Sudoku free?

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

### Is ECHO LOOP free?

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

### Do Sudoku or ECHO LOOP have ads?

ECHO LOOP shows ads; Sudoku does not.

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

Sudoku ships an update every 3 weeks, and ECHO LOOP every 3 days. Most recently, Sudoku was updated on October 29, 2026 and ECHO LOOP on October 20, 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.*