# HARMONY DSP vs Rainbow Plug&Play DSP

The clearest difference is update cadence: Rainbow Plug&Play DSP at every 2 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, Rainbow Plug&Play DSP every 2 months. The most recent releases landed on October 27, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | HARMONY DSP | Rainbow Plug&Play DSP |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 19 months | **Every 2 months** |
| Monetization | — | Free |
| Size | 3 MB | 26 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [APEX Italy](https://appshunter.io/developer/1446565085) | [Rainbow Audio GmbH](https://appshunter.io/developer/1284821198) |

## What reviewers say

### HARMONY DSP

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Rainbow Plug&Play DSP

[App page](https://appshunter.io/ios/app/rainbow-plug-and-play-dsp/id6449861179)

This utility app allows users to operate and configure a specific audio device using Bluetooth Low Energy. It provides a direct connection for managing settings and functionality.

**Highlights:** Bluetooth LE operation, Audio device configuration, Direct connection, Settings management

**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 Rainbow Plug&Play DSP free?

Rainbow Plug&Play DSP is free to download, with no in-app purchases.

### Do HARMONY DSP or Rainbow Plug&Play DSP have ads?

Neither HARMONY DSP nor Rainbow Plug&Play DSP shows ads.

### Which is updated more often, HARMONY DSP or Rainbow Plug&Play DSP?

HARMONY DSP ships an update every 19 months, and Rainbow Plug&Play DSP every 2 months. Most recently, HARMONY DSP was updated on October 27, 2026 and Rainbow Plug&Play DSP on October 5, 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.*