# HARMONY DSP vs DS18 iDSP

The clearest difference is update cadence: DS18 iDSP at every 6 months 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, DS18 iDSP every 6 months. The most recent releases landed on October 3, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | HARMONY DSP | DS18 iDSP |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/ds18-idsp/id6755451912/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 19 months | **Every 6 months** |
| Monetization | — | Free |
| Size | 3 MB | 59 MB |
| Requires iOS | **11.0** | 12.2 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [APEX Italy](https://appshunter.io/developer/1446565085) | [SPIRIT LLC](https://appshunter.io/developer/1327651109) |

## What reviewers say

### HARMONY DSP

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

**Features:** macOS Compatibility

**In-app purchases:** none


### DS18 iDSP

[App page](https://appshunter.io/ios/app/ds18-idsp/id6755451912)

Control specific digital sound processor models with a user-friendly interface. Adjust audio settings like routing, gain, crossover, and equalization in real-time. Includes a demo mode for learning and battery/limiter monitoring.

**Highlights:** Channel Routing, Gain Control (General & Channel), Crossover Settings, Limiter & Equalizer Adjustments, Time Alignment, Configurable Memories, Battery & Limiter Monitoring

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is HARMONY DSP free?

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

### Is DS18 iDSP free?

DS18 iDSP is free to download, with no in-app purchases.

### Do HARMONY DSP or DS18 iDSP have ads?

Neither HARMONY DSP nor DS18 iDSP shows ads.

### Which is updated more often, HARMONY DSP or DS18 iDSP?

HARMONY DSP ships an update every 19 months, and DS18 iDSP every 6 months. Most recently, HARMONY DSP was updated on October 3, 2026 and DS18 iDSP on October 20, 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.*