# dspMixFx vs Comp 609

The clearest difference is review sentiment: Comp 609 at 88% against dspMixFx's 29%. Comp 609 also leads on rating (4.8 vs 3.7). dspMixFx's advantage is in-app purchases (none vs 1). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. Comp 609 sells 1 one-off in-app purchase. dspMixFx asks for nothing beyond the download.

Comp 609 holds the better App Store score, 4.8 against 3.7. Both are backed by a comparable volume of ratings — 9 and 25 respectively. Written reviews point the same way: 29% of dspMixFx's written reviews are positive against 88% of Comp 609's.

dspMixFx ships an update every 11 months, Comp 609 every 7 months. The most recent releases landed on October 8, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | dspMixFx | Comp 609 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (9 ratings)](https://appshunter.io/ios/app/dspmixfx/id833462295/reviews) | **[4.8 (25 ratings)](https://appshunter.io/ios/app/comp-609/id1514569444/reviews)** |
| Number of ratings | 9 | **25** |
| Positive reviews | 29.2% of reviews | **87.5% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 7 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 53 MB | 21 MB |
| Requires iOS | **9.0** | 10.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Steinberg Media Technologies GmbH](https://appshunter.io/developer/316698251) | [RRS, OOO](https://appshunter.io/developer/1486125568) |

## What reviewers say

### dspMixFx

[App page](https://appshunter.io/ios/app/dspmixfx/id833462295)

This app provides latency-free monitoring and control of DSP features for compatible Yamaha audio interfaces on iOS devices. It enables access to effects like REV-X reverb and Guitar Amp Classics, enhancing your audio production workflow.

**Highlights:** Control DSP mixer and effects, Latency-free monitoring, REV-X reverb, Sweet Spot Morphing Channel Strip, Guitar Amp Classics

**In-app purchases:** none


### Comp 609

[App page](https://appshunter.io/ios/app/comp-609/id1514569444)

This audio effect plugin emulates analog compressors, offering extensive control over attack, release, ratio, and saturation. It supports various operation modes, external sidechaining, and parallel compression for detailed audio shaping. A demo version is available with a time limit.

**Highlights:** Analog compressor emulation, Adjustable attack, release, and ratio, External sidechain with high-pass filter, Multiple operation modes (M/S, Stereo, Mono), Parallel compression, Oversampling and 64-bit processing, Scalable GUI

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| RRS Comp 609 Unlimited | $4.99 | one-time |


## Frequently asked questions

### Is dspMixFx free?

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

### Is Comp 609 free?

Comp 609 is free to download, with in-app purchases available.

### Which has better reviews, dspMixFx or Comp 609?

Comp 609 is rated higher. dspMixFx averages 3.7 out of 5 from 9 ratings, while Comp 609 averages 4.8 from 25 ratings.

### Do dspMixFx or Comp 609 have ads?

Neither dspMixFx nor Comp 609 shows ads.

### Which is updated more often, dspMixFx or Comp 609?

dspMixFx ships an update every 11 months, and Comp 609 every 7 months. Most recently, dspMixFx was updated on October 8, 2026 and Comp 609 on September 30, 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.*