# TB DualVCF vs Qithesizer

The clearest difference is rating: TB DualVCF at 4.9 against Qithesizer's 4.1. TB DualVCF also leads on price ($4.99 vs $12.99) and iOS requirement (13.0 vs 15.0). Qithesizer's advantage is update cadence (fortnightly vs every 2 months). On review sentiment, ratings volume, ads and in-app purchases there is nothing between them.

TB DualVCF costs $4.99 and Qithesizer $12.99 up front. Neither carries in-app purchases, so what you see is what you pay.

TB DualVCF holds the better App Store score, 4.9 against 4.1. Both are backed by a comparable volume of ratings — 18 and 11 respectively. Written reviews point the same way: 80% of TB DualVCF's written reviews are positive against 77% of Qithesizer's.

TB DualVCF ships an update every 2 months, Qithesizer fortnightly. Both last shipped on October 24, 2026.

## The numbers

| Metric | TB DualVCF | Qithesizer |
| --- | --- | --- |
| Price | **$4.99** | $12.99 |
| Rating | **[4.9 (18 ratings)](https://appshunter.io/ios/app/tb-dualvcf/id1505169270/reviews)** | [4.1 (11 ratings)](https://appshunter.io/ios/app/qithesizer/id6444722040/reviews) |
| Number of ratings | **18** | 11 |
| Positive reviews | **80.0% of reviews** | 76.9% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Monetization | Paid | Paid |
| Size | 12 MB | 29 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ToneBoosters](https://appshunter.io/developer/1472446500) | [Robkoo Information & Technologies Co., Ltd.](https://appshunter.io/developer/987892941) |

## 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


### Qithesizer

[App page](https://appshunter.io/ios/app/qithesizer/id6444722040)

This advanced music synthesizer combines virtual analog, wavetable, and physical modeling sound engines. It offers extensive modulation capabilities, a built-in sequencer, and on-screen keyboard for creating complex sounds.

**Highlights:** Multiple sound engines (virtual analog, wavetable, physical modeling), Extensive modulation sources and destinations, Full MIDI mapping, 16-step sequencer with pattern editor, Waveform and dynamic visualizations, On-screen keyboard

**Features:** macOS Compatibility, 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 Qithesizer free?

Qithesizer costs $12.99, with no in-app purchases.

### Which has better reviews, TB DualVCF or Qithesizer?

TB DualVCF is rated higher. TB DualVCF averages 4.9 out of 5 from 18 ratings, while Qithesizer averages 4.1 from 11 ratings.

### Do TB DualVCF or Qithesizer have ads?

Neither TB DualVCF nor Qithesizer shows ads.

### Which is updated more often, TB DualVCF or Qithesizer?

TB DualVCF ships an update every 2 months, and Qithesizer fortnightly. Most recently, TB DualVCF was updated on October 24, 2026 and Qithesizer on October 24, 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.*