# HARMONY DSP vs A594DSP

The clearest difference is update cadence: A594DSP at every 5 weeks against HARMONY DSP's every 19 months. 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.

HARMONY DSP ships an update every 19 months, A594DSP every 5 weeks. The most recent releases landed on October 3, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | HARMONY DSP | A594DSP |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 19 months | **Every 5 weeks** |
| Size | 3 MB | 15 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [APEX Italy](https://appshunter.io/developer/1446565085) | [杏生 卢](https://appshunter.io/developer/1094592555) |

## What reviewers say

### HARMONY DSP

[App page](https://appshunter.io/ios/app/harmony-dsp/id1638244924)

**Features:** macOS Compatibility

**In-app purchases:** none


### A594DSP

[App page](https://appshunter.io/ios/app/a594dsp/id1670248501)

**In-app purchases:** none


## Frequently asked questions

### Is HARMONY DSP free?

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

### Is A594DSP free?

A594DSP is free to download, with no in-app purchases.

### Do HARMONY DSP or A594DSP have ads?

Neither HARMONY DSP nor A594DSP shows ads.

### Which is updated more often, HARMONY DSP or A594DSP?

HARMONY DSP ships an update every 19 months, and A594DSP every 5 weeks. Most recently, HARMONY DSP was updated on October 3, 2026 and A594DSP on October 11, 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.*