# 4GKey vs DSP sound master

The clearest difference is update cadence: 4GKey at every 2 months against DSP sound master's every 9 months. 4GKey also leads on iOS requirement (9.0 vs 13.0). 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.

4GKey ships an update every 2 months, DSP sound master every 9 months. The most recent releases landed on October 30, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | 4GKey | DSP sound master |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 9 months |
| Size | 92 MB | 24 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [克勤 刘](https://appshunter.io/developer/1566870371) | [师贤 陈](https://appshunter.io/developer/1754678152) |

## What reviewers say

### 4GKey

[App page](https://appshunter.io/ios/app/4gkey/id1574668344)

**Features:** macOS Compatibility

**In-app purchases:** none


### DSP sound master

[App page](https://appshunter.io/ios/app/dsp-sound-master/id6511249208)

**In-app purchases:** none


## Frequently asked questions

### Is 4GKey free?

4GKey is free to download, with no in-app purchases.

### Is DSP sound master free?

DSP sound master is free to download, with no in-app purchases.

### Do 4GKey or DSP sound master have ads?

Neither 4GKey nor DSP sound master shows ads.

### Which is updated more often, 4GKey or DSP sound master?

4GKey ships an update every 2 months, and DSP sound master every 9 months. Most recently, 4GKey was updated on October 30, 2026 and DSP sound master on October 27, 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.*