# Fastsound vs ServiceTests

The clearest difference is update cadence: ServiceTests at daily against Fastsound's every 6 months. Fastsound's advantage is iOS requirement (13.0 vs 15.0). On price, ads, 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.

Fastsound ships an update every 6 months, ServiceTests daily. The most recent releases landed on October 13, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Fastsound | ServiceTests |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Daily** |
| Size | 19 MB | 12 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [杭州发声者声学科技有限公司](https://appshunter.io/developer/1894757529) | [Thanh Nguyen](https://appshunter.io/developer/6777103907) |

## What reviewers say

### Fastsound

[App page](https://appshunter.io/ios/app/fastsound/id6762584727)

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

**In-app purchases:** none


### ServiceTests

[App page](https://appshunter.io/ios/app/servicetests/id6790297735)

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

**In-app purchases:** none


## Frequently asked questions

### Is Fastsound free?

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

### Is ServiceTests free?

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

### Do Fastsound or ServiceTests have ads?

Neither Fastsound nor ServiceTests shows ads.

### Which is updated more often, Fastsound or ServiceTests?

Fastsound ships an update every 6 months, and ServiceTests daily. Most recently, Fastsound was updated on October 13, 2026 and ServiceTests on September 30, 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.*