# PolyIvoks Filter vs Claravox

The clearest difference is review sentiment: PolyIvoks Filter at 86% against Claravox's 0%. PolyIvoks Filter also leads on ratings volume (21 vs 3) and iOS requirement (10.0 vs 14.3). Claravox's advantage is in-app purchases (none vs 1) and rating (5.0 vs 4.7). On price, update cadence, ads and device support there is nothing between them.

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

Claravox holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: PolyIvoks Filter has 21 ratings behind it against 3, so its average is the more settled of the two. Written reviews complicate that: 86% of PolyIvoks Filter's written reviews are positive against 0% of Claravox's, so the app with the better star average is not the one people write more warmly about.

PolyIvoks Filter ships an update fortnightly, Claravox every 3 weeks. The most recent releases landed on October 1, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | PolyIvoks Filter | Claravox |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (21 ratings)](https://appshunter.io/ios/app/polyivoks-filter/id1507649629/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/claravox/id1536620093/reviews)** |
| Number of ratings | **21** | 3 |
| Positive reviews | **85.7% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Monetization | Free with in-app purchases | **Free** |
| Size | 17 MB | 45 MB |
| Requires iOS | **10.0** | 14.3 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [RRS, OOO](https://appshunter.io/developer/1486125568) | [Moog Music Inc.](https://appshunter.io/developer/396776421) |

## What reviewers say

### 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 |


### Claravox

[App page](https://appshunter.io/ios/app/claravox/id1536620093)

This app provides an advanced interface for sound design and preset management for a specific theremin instrument. It unlocks additional synthesis features and allows users to craft, store, and share custom sonic creations.

**Highlights:** Intuitive graphical interface for all control parameters, Access advanced synthesis engine features, Create, store, and manage new presets, Edit existing presets and re-sculpt sounds, Share custom sonic creations and libraries, Update theremin firmware, Exclusive library of new presets

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is PolyIvoks Filter free?

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

### Is Claravox free?

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

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

Claravox is rated higher. PolyIvoks Filter averages 4.7 out of 5 from 21 ratings, while Claravox averages 5.0 from 3 ratings.

### Do PolyIvoks Filter or Claravox have ads?

Neither PolyIvoks Filter nor Claravox shows ads.

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

PolyIvoks Filter ships an update fortnightly, and Claravox every 3 weeks. Most recently, PolyIvoks Filter was updated on October 1, 2026 and Claravox on October 2, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*