# PolyIvoks Filter vs KandiTrax

The clearest difference is in-app purchases: KandiTrax at none against PolyIvoks Filter's 1. KandiTrax also leads on rating (5.0 vs 4.7). PolyIvoks Filter's advantage is update cadence (fortnightly vs every 6 weeks) and ratings volume (21 vs 2). On price, ads and device support there is nothing between them.

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

KandiTrax 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 2, so its average is the more settled of the two.

PolyIvoks Filter ships an update fortnightly, KandiTrax every 6 weeks. The most recent releases landed on October 1, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | PolyIvoks Filter | KandiTrax |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (21 ratings)](https://appshunter.io/ios/app/polyivoks-filter/id1507649629/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/kanditrax/id6755366898/reviews)** |
| Number of ratings | **21** | 2 |
| Positive reviews | 85.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 6 weeks |
| Monetization | Free with in-app purchases | **Free** |
| Size | 17 MB | 43 MB |
| Requires iOS | **10.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [RRS, OOO](https://appshunter.io/developer/1486125568) | [Dylan Elliott](https://appshunter.io/developer/1853437087) |

## 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 |


### KandiTrax

[App page](https://appshunter.io/ios/app/kanditrax/id6755366898)

This app helps you document and share your handmade crafts. Track your creations, discover new designs, and follow the journey of each piece as it's traded.

**Highlights:** Track craft creations, Discover new designs, Share craft stories, Follow craft journeys, Connect with creators

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is PolyIvoks Filter free?

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

### Is KandiTrax free?

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

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

KandiTrax is rated higher. PolyIvoks Filter averages 4.7 out of 5 from 21 ratings, while KandiTrax averages 5.0 from 2 ratings.

### Do PolyIvoks Filter or KandiTrax have ads?

Neither PolyIvoks Filter nor KandiTrax shows ads.

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

PolyIvoks Filter ships an update fortnightly, and KandiTrax every 6 weeks. Most recently, PolyIvoks Filter was updated on October 1, 2026 and KandiTrax on October 15, 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.*