# Fastsound vs Three9x

The clearest difference is update cadence: Three9x at every 5 weeks against Fastsound's every 6 months. Fastsound's advantage is iOS requirement (13.0 vs 15.6). 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, Three9x every 5 weeks. The most recent releases landed on October 13, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Fastsound | Three9x |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 5 weeks** |
| Size | 19 MB | 496 MB |
| Requires iOS | **13.0** | 15.6 |
| 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) | [THREE9X (SMC-PRIVATE) LIMITED](https://appshunter.io/developer/6782750724) |

## What reviewers say

### Fastsound

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

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

**In-app purchases:** none


### Three9x

[App page](https://appshunter.io/ios/app/three9x/id6782750722)

**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 Three9x free?

Three9x is free to download, with no in-app purchases.

### Do Fastsound or Three9x have ads?

Neither Fastsound nor Three9x shows ads.

### Which is updated more often, Fastsound or Three9x?

Fastsound ships an update every 6 months, and Three9x every 5 weeks. Most recently, Fastsound was updated on October 13, 2026 and Three9x on October 18, 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.*