# NuRack Auv3 FX Processor vs FrequencyCat

The clearest difference is price: FrequencyCat at Free against NuRack Auv3 FX Processor's $12.99. FrequencyCat also leads on rating (5.0 vs 4.7) and review sentiment (100% vs 84%). NuRack Auv3 FX Processor's advantage is update cadence (every 3 weeks vs every 40 months) and ratings volume (42 vs 1). On ads and in-app purchases there is nothing between them.

FrequencyCat is free to download; NuRack Auv3 FX Processor costs $12.99 up front. Neither carries in-app purchases, so what you see is what you pay.

FrequencyCat holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: NuRack Auv3 FX Processor has 42 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 84% of NuRack Auv3 FX Processor's written reviews are positive against 100% of FrequencyCat's.

NuRack Auv3 FX Processor ships an update every 3 weeks, FrequencyCat every 40 months. The most recent releases landed on September 25, 2026 and September 4, 2026 respectively.

## The numbers

| Metric | NuRack Auv3 FX Processor | FrequencyCat |
| --- | --- | --- |
| Price | $12.99 | **Free** |
| Rating | [4.7 (42 ratings)](https://appshunter.io/ios/app/nurack-auv3-fx-processor/id1520146960/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/frequencycat/id6448219399/reviews)** |
| Number of ratings | **42** | 1 |
| Positive reviews | 84.4% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 40 months |
| Monetization | Paid | **Free** |
| Best chart rank | **#182** | — |
| Size | 26 MB | 3 MB |
| Requires iOS | **13** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [4Pockets.com](https://appshunter.io/developer/370131860) | [Xuesong Zhang](https://appshunter.io/developer/1684075008) |

## What reviewers say

### NuRack Auv3 FX Processor

[App page](https://appshunter.io/ios/app/nurack-auv3-fx-processor/id1520146960)

**Currently charting:** #182 Top Paid · Music (US App Store)

Design custom audio and MIDI effects racks with over 80 building blocks. Route audio in series or parallel and create unique interfaces for your sound processing needs.

**Highlights:** Design custom effects racks, Over 80 audio and MIDI building blocks, Full routing control (series/parallel), Customizable interface builder, Seamless effect switching, 3 independent audio racks mode, Extensive automation options

**In-app purchases:** none


### FrequencyCat

[App page](https://appshunter.io/ios/app/frequencycat/id6448219399)

Transform your photos into unique sound art using advanced image-to-sound technology. Explore, enjoy, and share your creative audio-visual pieces. Embrace your inner artist and discover the unexpected.

**Highlights:** Morph images into sound art, Create spectrogram oddities, Share sound art creations, Unique audio-visual experience

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is NuRack Auv3 FX Processor free?

NuRack Auv3 FX Processor costs $12.99, with no in-app purchases.

### Is FrequencyCat free?

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

### Which has better reviews, NuRack Auv3 FX Processor or FrequencyCat?

FrequencyCat is rated higher. NuRack Auv3 FX Processor averages 4.7 out of 5 from 42 ratings, while FrequencyCat averages 5.0 from 1 ratings.

### Do NuRack Auv3 FX Processor or FrequencyCat have ads?

Neither NuRack Auv3 FX Processor nor FrequencyCat shows ads.

### Which is updated more often, NuRack Auv3 FX Processor or FrequencyCat?

NuRack Auv3 FX Processor ships an update every 3 weeks, and FrequencyCat every 40 months. Most recently, NuRack Auv3 FX Processor was updated on September 25, 2026 and FrequencyCat on September 4, 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.*