VoxSyn Pro vs NuRack Auv3 FX Processor
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
Read full descriptionHide full description
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
NuRack Auv3 FX Processor
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.
- 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
Read full descriptionHide full description
NuRack is an AUv3 based multi-channel audio and MIDI effects processor with a difference, it actually allows you to design your own custom effects using the 80+ building blocks provided. You have full control over routing which allows you to create complex audio paths in series or parallel. You can choose whether to use the stock interface or create your own custom interface using the built in Interface Builder which allows you to concentrate your audio components into a single customized effect. NuRack can run in one of two modes. The first providing 3 customizable effects racks which can be switched (manually or via MIDI), providing seemless switching (i.e. delay trails linger whilst another set of effects are faded in). The second mode allows you to route audio through 3 independent audio racks. A generaous number of over 80 audio and midi building blocks are provided covering 12 different categories of effects. Here are just some of those included in NuRack: Modulation Effects: Chorus, Flanger, Phaser, Tremolo, Vocal Doubler, TalkBox, UniVibe, Leslie & Vocoder. Time Based Effects: Stereo Delay, Tape Delay, Reverb and Reverse Delay. Spectral Effects: Parametric EQ, Graphic EQ, PitchShift, Auto-Pan, Bit-Crusher, Tube Overdrive, Distortion, Harmony, Harmonic Exciter and SlowMo. Dynamic Effects: VelocityControl, Compressor, Multi-Band Compressor, Noise Gate, Gate, and Limiter. Filter Effects: MultiFilter, LP/HP Filter, Frequency Splitter, MultiBand Splitter, Classic Filters, Formant Filter, Ring Modulation and Shelf Filter. MIDI Effects: MIDI Harmony, MIDI Velocity, MIDI Randomizer, MIDI Monitor, MIDI Mixer, MIDI Pads, MIDI Control, Strummer, MIDI Recorder, MIDI Modulation, MIDI Remap, CC Monitor, CC Generator, PitchBend, MIDI Time Clock, and ChordToMidi. Generator Modules: Noise, Audio Clip Launcher, SoundFont Player, Virtual Flute, Virtual Clarinet, Virtual Brass, FM Organ, FM Rhodes and Analog Sawtooth Synth. Automation: TouchPad, AutoMate, Pattern Automation, and Visual LFO. You also provide the ability to split and combine audio signal using splitters and mixer modules as well as a number of visual elements such as VU Meters, LED Meters, Scopes, Graphs etc. Some effects such as phaser and flanger are usually controlled by an LFO, but this can be detached and automated remotely. There are a number of modules that allow auomation based on direct touch (X/Y Pads), Visual LFO, Pattern Automation, MIDI input (CC data), or peak/rms level detection. These automation modules can remotely control knobs and sliders throughout your rack. Simply create a new rack and start adding modules to it. These modules are generally wired up automatically but these connections can be manually routed. Once you have your sound as you wish you can use it 'as is', or switch to Interface Builder mode where you can combine all your modules into a single interface. Elements can be dragged, dropped, resized and coloured as required. Add your own labels, image logos and custom backgrounds before saving your custom component. Use the X/Y Pad to control your modulation effects by detaching their LFO's. Use MIDI CC data to automate knobs. Use the velocity of an incoming signal to control the cutoff/resonance of a filter (wah) or volume level of a gain control (swell), as NuRack expands, so do the possibilities. Features: ○ Over 80 categorised modules. ○ 3 Input / Output busses supported. ○ Audio & MIDI effect. ○ Lots of audio & MIDI automation options. ○ Seemless transition between racks. ○ Manual audio path routing. ○ Open in presentation mode (auto hides controls). ○ Interface Builder to customize your rack. ○ AUv3 plugin runs in MIDI and none MIDI mode. ○ Add your own Text/Heading and Image/Logos and backgrounds to your design. ○ Compatibility options for DAW's not supporting multi-channels. ○ Dark/Light Modes Checkout the YouTube channel 'Paul the MusicMan' for demos and tutorials of NuRack.
Screenshots
Verdict
The clearest difference is review sentiment: NuRack Auv3 FX Processor at 84% against VoxSyn Pro's 20%. NuRack Auv3 FX Processor also leads on rating (4.7 vs 3.4) and update cadence (every 3 weeks vs every 2 months). VoxSyn Pro's advantage is price ($1.99 vs $12.99). On ads, in-app purchases, monetization model and device support 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 NuRack Auv3 FX Processor $12.99 up front. Neither carries in-app purchases, so what you see is what you pay.
NuRack Auv3 FX Processor holds the better App Store score, 4.7 against 3.4. Both are backed by a comparable volume of ratings — 14 and 42 respectively. Written reviews point the same way: 20% of VoxSyn Pro's written reviews are positive against 84% of NuRack Auv3 FX Processor's.
VoxSyn Pro ships an update every 2 months, NuRack Auv3 FX Processor every 3 weeks. The most recent releases landed on September 30, 2026 and September 25, 2026 respectively.
| Parameter | VoxSyn Pro | NuRack Auv3 FX Processor |
|---|---|---|
| Price | $1.99 — better | $12.99 |
| Rating | 3.4 (14 ratings) | 4.7 (42 ratings) — better |
| Positive reviews | 20.0% of reviews | 84.4% of reviews — better |
| Number of ratings | 14 | 42 — better |
| Update frequency | Every 2 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Best chart rank | — | #182 — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 13 |
| Further details — not scored | ||
| Size | 43 MB | 26 MB |
| Age rating | 4+ | 4+ |
| Developer | Harry Gohs | 4Pockets.com |
Customer experience
VoxSyn Pro
NuRack Auv3 FX Processor
In-app purchases
VoxSyn Pro
No in-app purchases
NuRack Auv3 FX Processor
No in-app purchases
Questions
Is VoxSyn Pro free?
Is NuRack Auv3 FX Processor free?
Which has better reviews, VoxSyn Pro or NuRack Auv3 FX Processor?
Do VoxSyn Pro or NuRack Auv3 FX Processor have ads?
Which is updated more often, VoxSyn Pro or NuRack Auv3 FX Processor?
Other comparisons















