Comparison

NuRack Auv3 FX Processor vs FabFilter Twin 3

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

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
Read 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.

About

FabFilter Twin 3

This powerful virtual analog synthesizer offers a redesigned interface and expanded sound-shaping capabilities. Create a wide range of synth sounds with advanced oscillators, filters, a flexible modulation system, and an all-new FX section. It supports MIDI input and MPE for expressive performances.

Highlights
  • Virtual analog synthesis
  • Flexible oscillators and filters
  • Advanced modulation system
  • All-new FX section
  • MPE support
  • Arpeggiator
  • Preset browser
Features
Read full description

Since its first release in 2005, FabFilter Twin has been famous for its filter quality and oscillator sound. FabFilter Twin 3 expands and improves on its predecessors in every area, including a complete redesign of the GUI and workflow, more and better oscillators and filters, a radically powered-up modulation system, an all-new FX section, and much more. Sonically versatile, supremely intuitive, and spectacularly ‘analog’, Twin 3 is a dream instrument for creating synth sounds of all kinds, from basses, leads, and pads to plucks, drums, effects, and beyond. The Twin 3 app lets you play via the on-screen keyboard or a MIDI keyboard connected to your iPad. To use Twin 3 as a plug-in, you need an AUv3-compatible host app like Auria, AUM or Cubasis. Twin 3 will appear in the list of Audio Unit extensions for instrument plug-ins in the host app. Key features: - Virtual analog synth featuring four flexible oscillators, four filters, six FX modules, and a vast modulation system with a wealth of flexible source signal generators, drag and drop source/target routing, and no limit to the number of modulation assignments that can be made - Fully redesigned, greatly simplified interface with easier workflow - Completely overhauled modulation system with redesigned modulation sources, and floating slot and FX panels - All-new FX section, housing Reverb, Delay, Chorus, Phaser, Drive, and Compressor modules - MPE support for expressive, per-note modulation - Arpeggiator with Groove/Legato controls, note order, latch options, and more - Full-featured preset browser, with tags, favorites, and search and filter functions, and new factory preset library - Per Oscillator polyphony mode: each incoming note triggers a different oscillator - Bell, Shelf, and Notch vintage-style EQ filter shapes - 6dB/octave filter slope option - Modulatable filter Cutoff/Peak Offset knobs knobs, for adjusting all filters at once - High Quality mode — 4x oversampling - Transient mode turns Envelope Followers into transient detectors - Curve adjustment handles for EG Attack, Decay, and Release stages - Slider mode (vertical-only operation) and Range setting (toggles between bipolar and unipolar behavior) for XY controllers - Hide all modulation sources except for XY controllers and Sliders at a click - Native sustain pedal support - Even better oscillator and filter sound quality, with analog-modelled drift - Maximum number of voices doubled from 32 to 64 - Lower minimum Envelope Generator Attack, Decay, and Release times - Maximum number of XY controllers/Sliders increased to six - Envelope Generator Threshold, XLFO Balance, and Frequency Offset made available as modulation targets - Modulation sources can be renamed - Maximum number of modulation slots increased to 100 - Legato mode for MIDI-triggered XLFO - Range options added to MIDI Sources: Negative (-1 to 0), Centered (-1 to 1), and Positive (0 to 1) - Carefully designed and curated factory presets, plus the ability to save your own presets - Undo/redo and A/B comparison "FabFilter Twin is one of the best virtual analogues we've heard so far, and at this price point it's well worth the investment!" — Computer Music "Once I found FabFilter Twin, I immediately noticed how great it works and how amazing it sounds!" — George Morel

Screenshots

NuRack Auv3 FX Processor4 screens

Verdict

The call

The clearest difference is price: NuRack Auv3 FX Processor at $12.99 against FabFilter Twin 3's $24.99. NuRack Auv3 FX Processor also leads on update cadence (every 3 weeks vs every 10 months) and device support (3 vs 1). On rating, review sentiment, ratings volume and ads 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

CostPrice · In-app purchases · Ads · Monetization

NuRack Auv3 FX Processor costs $12.99 and FabFilter Twin 3 $24.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.7 for NuRack Auv3 FX Processor against 4.6 for FabFilter Twin 3. Both are backed by a comparable volume of ratings — 41 and 42 respectively. Written reviews are what separate them: 84% of NuRack Auv3 FX Processor's written reviews are positive against 86% of FabFilter Twin 3's.

UpkeepUpdate frequency

NuRack Auv3 FX Processor ships an update every 3 weeks, FabFilter Twin 3 every 10 months. The most recent releases landed on November 13, 2026 and November 7, 2026 respectively.

Scorecard3 real differences · 7 level
NuRack Auv3 FX Processor versus FabFilter Twin 3: the parameters behind the verdict, then further details
ParameterNuRack Auv3 FX ProcessorFabFilter Twin 3
Price$12.99 — better$24.99
Rating4.7 (41 ratings) — better4.6 (42 ratings)
Positive reviews84.4% of reviews86.2% of reviews — better
Number of ratings4142 — better
Update frequencyEvery 3 weeks — betterEvery 10 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPod — betteriPad
Requires iOS13 — better14.0
Further details — not scored
Size26 MB14 MB
Age rating4+4+
Developer4Pockets.comFabFilter

Customer experience

NuRack Auv3 FX Processor

All ratings42 ratings
Positive92.9%
Neutral2.4%
Negative4.8%
Written reviews32 reviews
Positive84.4%
Neutral6.3%
Negative9.4%

FabFilter Twin 3

All ratings42 ratings
Positive92.9%
Neutral2.4%
Negative4.8%
Written reviews29 reviews
Positive86.2%
Neutral6.9%
Negative6.9%

In-app purchases

None

NuRack Auv3 FX Processor

No in-app purchases

None

FabFilter Twin 3

No in-app purchases

Questions

Is NuRack Auv3 FX Processor free?
NuRack Auv3 FX Processor costs $12.99, with no in-app purchases.
Is FabFilter Twin 3 free?
FabFilter Twin 3 costs $24.99, with no in-app purchases.
Which has better reviews, NuRack Auv3 FX Processor or FabFilter Twin 3?
NuRack Auv3 FX Processor is rated higher. NuRack Auv3 FX Processor averages 4.7 out of 5 from 41 ratings, while FabFilter Twin 3 averages 4.6 from 42 ratings.
Do NuRack Auv3 FX Processor or FabFilter Twin 3 have ads?
Neither NuRack Auv3 FX Processor nor FabFilter Twin 3 shows ads.
Which is updated more often, NuRack Auv3 FX Processor or FabFilter Twin 3?
NuRack Auv3 FX Processor ships an update every 3 weeks, and FabFilter Twin 3 every 10 months. Most recently, NuRack Auv3 FX Processor was updated on November 13, 2026 and FabFilter Twin 3 on November 7, 2026.

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