# dspMixFx vs EQ550

The clearest difference is rating: EQ550 at 4.5 against dspMixFx's 3.7. EQ550 also leads on update cadence (monthly vs every 11 months). dspMixFx's advantage is in-app purchases (none vs 1). On price, review sentiment, ratings volume and ads there is nothing between them.

Both are free to download. EQ550 sells 1 one-off in-app purchase. dspMixFx asks for nothing beyond the download.

EQ550 holds the better App Store score, 4.5 against 3.7. Both are backed by a comparable volume of ratings — 9 and 11 respectively. Written reviews point the same way: 29% of dspMixFx's written reviews are positive against 33% of EQ550's.

dspMixFx ships an update every 11 months, EQ550 monthly. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | dspMixFx | EQ550 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (9 ratings)](https://appshunter.io/ios/app/dspmixfx/id833462295/reviews) | **[4.5 (11 ratings)](https://appshunter.io/ios/app/eq550/id1507132030/reviews)** |
| Number of ratings | 9 | **11** |
| Positive reviews | 29.2% of reviews | **33.3% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 11 months | **Monthly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 53 MB | 20 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


### EQ550

[App page](https://appshunter.io/ios/app/eq550/id1507132030)

This audio effect plugin emulates classic American EQs from the late 1960s, offering precise control over equalization with unique Proportional Q technology. It functions as a standalone app or an AUv3 plugin for compatible hosts, providing a flexible and characterful sound shaping experience.

**Highlights:** Standalone and AUv3 plugin, 3 bands of classic American equalization, Proportional Q filter bandwidth, Stereo, Mid, or Side EQ modes, Undo/Redo and A/B comparison, Scalable GUI

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| RRS EQ550 Unlimited | $4.99 | one-time |


## Frequently asked questions

### Is dspMixFx free?

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

### Is EQ550 free?

EQ550 is free to download, with in-app purchases available.

### Which has better reviews, dspMixFx or EQ550?

EQ550 is rated higher. dspMixFx averages 3.7 out of 5 from 9 ratings, while EQ550 averages 4.5 from 11 ratings.

### Do dspMixFx or EQ550 have ads?

Neither dspMixFx nor EQ550 shows ads.

### Which is updated more often, dspMixFx or EQ550?

dspMixFx ships an update every 11 months, and EQ550 monthly. Most recently, dspMixFx was updated on October 23, 2026 and EQ550 on October 24, 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.*