VoxSyn Pro vs TB DualVCF
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
VoxSyn Pro
Transform your voice into a versatile sound generator with real-time pitch and spectral control. Explore a vast library of synthesizer sounds, expand them with a unique random generator, and create signature vocal effects beyond traditional vocoding. Compatible with AUv3 hosts for seamless integration into your music production workflow.
- Voice control of pitch and timbre
- Mix original voice, synth carrier, and vocoded signal
- 22-channel vocoder
- Integrated preset synthesizer engine
- Hundreds of presets
- Hi-end effects suite
- AUv3 compatible
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VoxSyn Pro turns your voice into the most flexible vocal sound generator ever. Instantly following even subtle modulations of pitch and spectral changes of your voice VoxSyn Pro creates signature vocal sounds far beyond traditional vocoding. Talk or sing into the microphone and you’ll trigger various synthesizer sounds following your voice pitch or the notes touched on the hexagonal keyboard / external MIDI Keyboard. The basic sounds are selected from a vast pool of predefined sounds from the famous TERA synthesis engine which can be further expanded by its unique random sound generator. The harmonic table note layout visualises your voices pitch in realtime and also let you play notes for more traditional vocoder effects. VoxSyn Pro is AUv3 compatible and can be used in AU Host apps like Garageband, Cubasis, AUM and many more. Important: Users of VoxSyn should wait for the App bundle to save money. Features: - Voice control of pitch and timbre - Free Mix of original voice, synthesizer carrier and vocoded signal. - 22-channel Vocoder - Integrated preset synthesizer engine - Hundreds of presets included - Hi-end Reverb and Chorus/Delay/Distortion/Phaser effects - Share/Export of audio recordings - CoreMIDI / Virtual MIDI and Background audio - Inter App Audio compatible - AUv3 AudioUnit with parameter automation - Audiobus 3 support (Input/Filter/Output) with state saving
TB DualVCF
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.
- Dual analog filter sections
- Dozens of vintage filter models
- Envelope followers
- Intuitive modulation editor
- AUv3 plug-in compatibility
- Real-time audio processing
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Dual VCF - the ultimate dynamic filtering AUv3 plug-in! Dual VCF adds motion, shape, and colour. It produces evolving rhythmic movement and complex dynamic filter shapes. It contains dozens of analog filter models with that sought-after sound of the 70s, 80s and 90s. Combined with envelope followers and intuitive modulation editors, it provides almost infinite possibilities for creative aural exploration. Dual VCF features two filter sections, each supporting dozens of low-pass, high-pass and band-pass filter types. Every type is painstakenly modeled after analog filter types found in analog gear, analog synthesizers, and alike, including non-linear filter behavior. Dial in that characterstic 70s, 80s or 90s filter to add some analog flavor to your tracks! Each filter's cut-off frequency and resonance can be sequenced with an intuitive, free-running or beat-synced modulation editor. Seamlessly switch between sine, triangle, noise, or user-defined modulation waveforms. In addition, these parameters can also be modulated with the built-in envelope follower. The ToneBoosters DualVCF app captures the microphone (or external sound card) input and processes the signals in real time. To use it as a plug-in, use an AUv3-compatible host app such as Steinberg Cubasis, Apple Garageband, Audio Evolution Mobile Studio, Auria, AUM, or others. ToneBoosters DualVCF will appear in the list of Audio Unit extensions for effect plug-ins. How to use DualVCF as AUv3 plugin in a host program, start your favourite AUv3 host app (Steinberg Cubasis, Apple Garageband, Audio Evolution Mobile Studio, Auria, AUM, or others) and add TB DualVCF as Audio Unit insert effect to a track or output bus. See below on how to use Audio Units in various host apps. Key features: - The same professional sound as the acclaimed desktop version - Two analog filter sections with dozens of filter designs - Intuitive modulation editor for creative, rhythmic and evolving effects - Undo/redo, and A/B comparison - Color themes for the user interface - Max screen support in Garageband - Optimised for iPad and compatible with iPhone and iPod Touch What you should know: - Licenses acquired for this platform are not compatible with other platforms. - Audio Unit (AUv3) extensions require an iPad mini 2, iPad 4 or later models.
Screenshots
Verdict
The clearest difference is review sentiment: TB DualVCF at 80% against VoxSyn Pro's 20%. TB DualVCF also leads on rating (4.9 vs 3.4). VoxSyn Pro's advantage is price ($1.99 vs $4.99). On ratings volume, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
VoxSyn Pro costs $1.99 and TB DualVCF $4.99 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 3.4. Both are backed by a comparable volume of ratings — 14 and 18 respectively. Written reviews point the same way: 20% of VoxSyn Pro's written reviews are positive against 80% of TB DualVCF's.
Both ship on a similar rhythm, roughly every 2 months. Both last shipped on October 24, 2026.
| Parameter | VoxSyn Pro | TB DualVCF |
|---|---|---|
| Price | $1.99 — better | $4.99 |
| Rating | 3.4 (14 ratings) | 4.9 (18 ratings) — better |
| Positive reviews | 20.0% of reviews | 80.0% of reviews — better |
| Number of ratings | 14 | 18 — better |
| Update frequency | Every 2 months | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 43 MB | 12 MB |
| Age rating | 4+ | 4+ |
| Developer | Harry Gohs | ToneBoosters |
Customer experience
VoxSyn Pro
TB DualVCF
In-app purchases
VoxSyn Pro
No in-app purchases
TB DualVCF
No in-app purchases









