# System Sound vs MR dyaco

The clearest difference is ads: MR dyaco at none against System Sound's shown. On price, update cadence, in-app purchases and device support there is nothing between them.

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

System Sound ships an update every 2 weeks, MR dyaco every 10 days. The most recent releases landed on October 20, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | System Sound | MR dyaco |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 2 weeks | **Every 10 days** |
| Size | 36 MB | 74 MB |
| Requires iOS | **15.8.3** | 16.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) | [Dyaco International Inc.](https://appshunter.io/developer/1100739707) |

## What reviewers say

### System Sound

[App page](https://appshunter.io/ios/app/system-sound/id6504702118)

**Features:** macOS Compatibility

**In-app purchases:** none


### MR dyaco

[App page](https://appshunter.io/ios/app/mr-dyaco/id6550908795)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is System Sound free?

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

### Is MR dyaco free?

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

### Do System Sound or MR dyaco have ads?

System Sound shows ads; MR dyaco does not.

### Which is updated more often, System Sound or MR dyaco?

System Sound ships an update every 2 weeks, and MR dyaco every 10 days. Most recently, System Sound was updated on October 20, 2026 and MR dyaco on October 25, 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.*