# dspMixFx vs PolyIvoks Filter

The clearest difference is review sentiment: PolyIvoks Filter at 86% against dspMixFx's 27%. PolyIvoks Filter also leads on rating (4.7 vs 3.7) and update cadence (fortnightly vs every 11 months). dspMixFx's advantage is in-app purchases (none vs 1). On price, ratings volume, ads and device support there is nothing between them.

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

PolyIvoks Filter holds the better App Store score, 4.7 against 3.7. Both are backed by a comparable volume of ratings — 9 and 21 respectively. Written reviews point the same way: 27% of dspMixFx's written reviews are positive against 86% of PolyIvoks Filter's.

dspMixFx ships an update every 11 months, PolyIvoks Filter fortnightly. The most recent releases landed on September 20, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | dspMixFx | PolyIvoks Filter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (9 ratings)](https://appshunter.io/ios/app/dspmixfx/id833462295/reviews) | **[4.7 (21 ratings)](https://appshunter.io/ios/app/polyivoks-filter/id1507649629/reviews)** |
| Number of ratings | 9 | **21** |
| Positive reviews | 26.7% of reviews | **85.7% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 11 months | **Fortnightly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 53 MB | 17 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


### PolyIvoks Filter

[App page](https://appshunter.io/ios/app/polyivoks-filter/id1507649629)

This audio effect plugin emulates the sound of a legendary 1980s Soviet synthesizer filter. It offers stereo output and a range of modulation and envelope controls for creative sound shaping. A demo version is available with limited free play time.

**Highlights:** Standalone and AUv3 plugin, Modeled vintage filter, LFO and envelope modulation, Stereo output, Scalable GUI, Undo/Redo and A/B comparison

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| RRS PolyIvoks Filter Unlimited | $4.99 | one-time |


## Frequently asked questions

### Is dspMixFx free?

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

### Is PolyIvoks Filter free?

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

### Which has better reviews, dspMixFx or PolyIvoks Filter?

PolyIvoks Filter is rated higher. dspMixFx averages 3.7 out of 5 from 9 ratings, while PolyIvoks Filter averages 4.7 from 21 ratings.

### Do dspMixFx or PolyIvoks Filter have ads?

Neither dspMixFx nor PolyIvoks Filter shows ads.

### Which is updated more often, dspMixFx or PolyIvoks Filter?

dspMixFx ships an update every 11 months, and PolyIvoks Filter fortnightly. Most recently, dspMixFx was updated on September 20, 2026 and PolyIvoks Filter on September 13, 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.*