# HARMONY DSP vs HydroLink by Liquid Tec

The clearest difference is update cadence: HydroLink by Liquid Tec at every 4 months against HARMONY DSP's every 19 months. HARMONY DSP's advantage is iOS requirement (11.0 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.

HARMONY DSP ships an update every 19 months, HydroLink by Liquid Tec every 4 months. The most recent releases landed on October 27, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | HARMONY DSP | HydroLink by Liquid Tec |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 19 months | **Every 4 months** |
| Size | 3 MB | 108 MB |
| Requires iOS | **11.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [APEX Italy](https://appshunter.io/developer/1446565085) | [GHS Companies](https://appshunter.io/developer/876503219) |

## What reviewers say

### HARMONY DSP

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

**Features:** macOS Compatibility

**In-app purchases:** none


### HydroLink by Liquid Tec

[App page](https://appshunter.io/ios/app/hydrolink-by-liquid-tec/id6764107468)

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

**In-app purchases:** none


## Frequently asked questions

### Is HARMONY DSP free?

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

### Is HydroLink by Liquid Tec free?

HydroLink by Liquid Tec is free to download, with no in-app purchases.

### Do HARMONY DSP or HydroLink by Liquid Tec have ads?

Neither HARMONY DSP nor HydroLink by Liquid Tec shows ads.

### Which is updated more often, HARMONY DSP or HydroLink by Liquid Tec?

HARMONY DSP ships an update every 19 months, and HydroLink by Liquid Tec every 4 months. Most recently, HARMONY DSP was updated on October 27, 2026 and HydroLink by Liquid Tec on October 29, 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.*