# suuudokuuu vs ECHO LOOP

The clearest difference is ads: suuudokuuu at none against ECHO LOOP's shown. ECHO LOOP's advantage is update cadence (every 3 days vs every 8 days). 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.

suuudokuuu ships an update every 8 days, ECHO LOOP every 3 days. The most recent releases landed on October 13, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | suuudokuuu | ECHO LOOP |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/suuudokuuu-sudoku-puzzles/id6449440933/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 8 days | **Every 3 days** |
| Monetization | Free | — |
| Size | 59 MB | 5 MB |
| Requires iOS | **16.4** | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Vitalii Yehorov](https://appshunter.io/developer/1689109738) | [RYO TAKENO](https://appshunter.io/developer/6791367948) |

## What reviewers say

### suuudokuuu

[App page](https://appshunter.io/ios/app/suuudokuuu-sudoku-puzzles/id6449440933)

Experience challenging Sudoku puzzles with customizable themes and a unique Hell difficulty level. Compete with friends in a rival mode and replay your games with detailed scoring. This app offers a pure, ad-free puzzle experience.

**Highlights:** Six difficulty levels, including Hell, Full theme customization with live preview, Rival mode for challenging friends, Move-by-move game replay, Technique-aware scoring, Offline play

**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 suuudokuuu free?

suuudokuuu 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 suuudokuuu or ECHO LOOP have ads?

ECHO LOOP shows ads; suuudokuuu does not.

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

suuudokuuu ships an update every 8 days, and ECHO LOOP every 3 days. Most recently, suuudokuuu was updated on October 13, 2026 and ECHO LOOP on October 3, 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.*