Comparison

MIDI Tools vs NuRack Auv3 FX Processor

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

Head to head
About

MIDI Tools

This application provides a suite of MIDI audio units for iOS, allowing users to manipulate MIDI messages within their DAW's effects chain. It offers tools for altering velocity, transposing keys, monitoring events, and routing MIDI to external hardware or internal buses.

Highlights
  • MIDI message manipulation within DAW effects chains
  • 8 AUv3 MIDI audio units
  • Velocity and aftertouch alteration
  • Key transposition and range restriction
  • MIDI event monitoring and reporting
  • Tempo-synced trigger blocking
  • External and internal MIDI routing
Features
Read full description

MIDI Tools is a suite of AUv3 MIDI audio units for iOS that lets you manipulate the MIDI messages inside your DAW’s effects chain, creating complex or otherwise impossible MIDI routings or effects. The app contains 8 MIDI audio units in a single package, which can be loaded in compatible hosts (BeatMaker 3, Cubasis 2, AUM, ApeMatrix etc.). Make sure your host is capable of loading, transmitting to, and receiving MIDI from audio unit MIDI effects. They’re intended to augment existing MIDI processing capabilities, or in scenarios where a host doesn’t provide the required functionality out of the box. 1) MIDI Curve: Alter velocity or aftertouch values (0-127) in a controlled or random manner. 2) MIDI Key Zone: Transpose and restrict the playable key range. Perform velocity fades across various pitch ranges. Generate polyphonic chord fade effects. 3) MIDI Monitor: Monitor MIDI events in an effects chain, with detailed reports. 4) MIDI De-Ghost: Tempo synced trigger block, useful for hardware pad controllers that double-trigger, or removing ghost notes. It can also be used creatively to generate polyrhythms and gate-shifting effects. 5) MIDI Route: External MIDI routing capabilities. Route MIDI to external hardware, loopback to other tracks or banks. Record MIDI audio units generator output in DAWs which lack the ability to perform complex in-app MIDI routing. 6) MIDI Bus: Internal MIDI busing capabilities, designed for DAWs which lack the ability to perform complex in-app MIDI routing. 7) MIDI Latch: Enable latching and sustain capabilities, in any DAW that supports MIDI audio units. 8) MIDI Clone & Filter: Clone and filter incoming MIDI across different channels, in any DAW that supports MIDI audio units.

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.

Screenshots

NuRack Auv3 FX Processor4 screens

Verdict

The call

The clearest difference is price: MIDI Tools at $4.99 against NuRack Auv3 FX Processor's $12.99. MIDI Tools also leads on update cadence (every 4 days vs every 3 weeks) and iOS requirement (11.0 vs 13). NuRack Auv3 FX Processor's advantage is review sentiment (84% vs 70%) and device support (3 vs 1). On rating, ratings volume, 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

CostPrice · In-app purchases · Ads · Monetization

MIDI Tools costs $4.99 and NuRack Auv3 FX Processor $12.99 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 MIDI Tools against 4.7 for NuRack Auv3 FX Processor. Both are backed by a comparable volume of ratings — 22 and 42 respectively. Written reviews are what separate them: 70% of MIDI Tools's written reviews are positive against 84% of NuRack Auv3 FX Processor's.

UpkeepUpdate frequency

MIDI Tools ships an update every 4 days, NuRack Auv3 FX Processor every 3 weeks. The most recent releases landed on October 9, 2026 and October 8, 2026 respectively.

Scorecard5 real differences · 5 level
MIDI Tools versus NuRack Auv3 FX Processor: the parameters behind the verdict, then further details
ParameterMIDI ToolsNuRack Auv3 FX Processor
Price$4.99 — better$12.99
Rating4.7 (22 ratings)4.7 (42 ratings)
Positive reviews70.0% of reviews84.4% of reviews — better
Number of ratings2242 — better
Update frequencyEvery 4 days — betterEvery 3 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPadiPhone, iPad, iPod — better
Requires iOS11.0 — better13
Further details — not scored
Size11 MB26 MB
Age rating4+4+
DeveloperVictor Porof4Pockets.com

Customer experience

MIDI Tools

All ratings22 ratings
Positive95.5%
Neutral0.0%
Negative4.5%
Written reviews10 reviews
Positive70.0%
Neutral10.0%
Negative20.0%

NuRack Auv3 FX Processor

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

In-app purchases

None

MIDI Tools

No in-app purchases

None

NuRack Auv3 FX Processor

No in-app purchases

Questions

Is MIDI Tools free?
MIDI Tools costs $4.99, with no in-app purchases.
Is NuRack Auv3 FX Processor free?
NuRack Auv3 FX Processor costs $12.99, with no in-app purchases.
Which has better reviews, MIDI Tools or NuRack Auv3 FX Processor?
MIDI Tools and NuRack Auv3 FX Processor are both rated 4.7 out of 5 on the App Store, from 22 and 42 ratings respectively.
Do MIDI Tools or NuRack Auv3 FX Processor have ads?
Neither MIDI Tools nor NuRack Auv3 FX Processor shows ads.
Which is updated more often, MIDI Tools or NuRack Auv3 FX Processor?
MIDI Tools ships an update every 4 days, and NuRack Auv3 FX Processor every 3 weeks. Most recently, MIDI Tools was updated on October 9, 2026 and NuRack Auv3 FX Processor on October 8, 2026.

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