# TB DualVCF vs GSDSP Quantum Filter

The clearest difference is price: TB DualVCF at $4.99 against GSDSP Quantum Filter's $14.99. TB DualVCF also leads on ratings volume (18 vs 3). GSDSP Quantum Filter's advantage is review sentiment (100% vs 80%). On rating, update cadence, ads and in-app purchases there is nothing between them.

TB DualVCF costs $4.99 and GSDSP Quantum Filter $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 4.9 for TB DualVCF against 5.0 for GSDSP Quantum Filter. That said, the two scores are not equally well evidenced: TB DualVCF has 18 ratings behind it against 3, so its average is the more settled of the two. Written reviews are what separate them: 80% of TB DualVCF's written reviews are positive against 100% of GSDSP Quantum Filter's.

TB DualVCF ships an update every 2 months, GSDSP Quantum Filter every 5 weeks. The most recent releases landed on October 9, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | TB DualVCF | GSDSP Quantum Filter |
| --- | --- | --- |
| Price | **$4.99** | $14.99 |
| Rating | [4.9 (18 ratings)](https://appshunter.io/ios/app/tb-dualvcf/id1505169270/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/gsdsp-quantum-filter/id6498711920/reviews)** |
| Number of ratings | **18** | 3 |
| Positive reviews | 80.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Monetization | Paid | Paid |
| Size | 12 MB | 77 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ToneBoosters](https://appshunter.io/developer/1472446500) | [Gustav Scholda](https://appshunter.io/developer/1642323227) |

## What reviewers say

### TB DualVCF

[App page](https://appshunter.io/ios/app/tb-dualvcf/id1505169270)

This app offers a dual analog filter plug-in for music production, providing a wide range of vintage filter models to shape sound. It features intuitive modulation and envelope followers for creative audio exploration, compatible with AUv3 hosts.

**Highlights:** Dual analog filter sections, Dozens of vintage filter models, Envelope followers, Intuitive modulation editor, AUv3 plug-in compatibility, Real-time audio processing

**In-app purchases:** none


### GSDSP Quantum Filter

[App page](https://appshunter.io/ios/app/gsdsp-quantum-filter/id6498711920)

This audio effect plugin offers analog-modeled filters with flexible routing and dynamic modulation for creative sound design. It provides extensive control over tone shaping and complex filtering with various filter types and configurations.

**Highlights:** Analog-modelled filters, 11 filter modes, Series and parallel routing, Dynamic modulation support, Stereo and dual mono modes, MIDI control integration

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is TB DualVCF free?

TB DualVCF costs $4.99, with no in-app purchases.

### Is GSDSP Quantum Filter free?

GSDSP Quantum Filter costs $14.99, with no in-app purchases.

### Which has better reviews, TB DualVCF or GSDSP Quantum Filter?

GSDSP Quantum Filter is rated higher. TB DualVCF averages 4.9 out of 5 from 18 ratings, while GSDSP Quantum Filter averages 5.0 from 3 ratings.

### Do TB DualVCF or GSDSP Quantum Filter have ads?

Neither TB DualVCF nor GSDSP Quantum Filter shows ads.

### Which is updated more often, TB DualVCF or GSDSP Quantum Filter?

TB DualVCF ships an update every 2 months, and GSDSP Quantum Filter every 5 weeks. Most recently, TB DualVCF was updated on October 9, 2026 and GSDSP Quantum Filter on September 22, 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.*