# echo~echo | êkhos vs SR

The clearest difference is price: echo~echo | êkhos at Free against SR's $1.99. echo~echo | êkhos also leads on device support (5 vs 2). SR's advantage is iOS requirement (15.0 vs 17.0). On ads and in-app purchases there is nothing between them.

echo~echo | êkhos is free to download; SR costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | echo~echo | êkhos | SR |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Size | 791 MB | 67 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | **iPhone, iPad, Mac, Apple TV, Vision Pro** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [United App Sp. z o.o.](https://appshunter.io/developer/6780957160) | [Studio Romann](https://appshunter.io/developer/6805713109) |

## What reviewers say

### echo~echo | êkhos

[App page](https://appshunter.io/ios/app/echoecho-ekhos/id6780960485)

**In-app purchases:** none


### SR

[App page](https://appshunter.io/ios/app/sr-sequencer/id6805713107)

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

**In-app purchases:** none


## Frequently asked questions

### Is echo~echo | êkhos free?

echo~echo | êkhos is free to download, with no in-app purchases.

### Is SR free?

SR costs $1.99, with no in-app purchases.

### Do echo~echo | êkhos or SR have ads?

Neither echo~echo | êkhos nor SR shows ads.

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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.*