Comparison

MIDI Designer Pro X vs NERD Synth A2x + AUv3

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

Head to head
About

MIDI Designer Pro X

This app is a professional-grade, customizable MIDI controller for music production. It allows users to control any MIDI-enabled hardware or software, with extensive community-created layouts and powerful 'superpowers' for advanced MIDI manipulation. It supports AUv3 plugins and offers robust network, Bluetooth, and USB MIDI communication.

Highlights
  • Control any MIDI-enabled hardware/software
  • AUv3 MIDI Processor Extension
  • Reliable MIDI communication (Network, Bluetooth, USB)
  • Extensive user layout library (350+ layouts)
  • Powerful 'Superpowers' for MIDI manipulation
  • Community support and layout sharing
Features
Read full description

MIDI Designer Pro X (MDPx) is the culmination of over a decade of improvement. We launched MIDI Designer Pro in 2012 and relaunched it in 2016 as MIDI Designer Pro 2. MDP2 was the first and only professional-grade MIDI controller built natively for iOS, earning critical acclaim. Since launch, over 80 updates have greatly expanded its capabilities. Our user-created library now covers 375+ MIDI targets across music hardware and software. In 2024, MDPx took a significant leap forward with the expressive "Spaceship" theme on iPad and Mac and major iPhone usability advances. It now adds AUv3 support in hosts such as AUM, Cubasis, and Logic. A new subscription model — Premium — allows even more users to use the App in their music-making and discover the App Store's best MIDI controller for themselves. CAPABILITIES • Control all MIDI-enabled hardware and software: keyboards, synths, effects, pedals, DAWs, plug-ins, DJ, VJ & lighting rigs, other iOS apps, robots, cruise ships, rail guns, particle accelerators • AUv3 MIDI Processor Extension: Host MDPx inside AUM, Cubasis, Logic, and other AUv3 hosts. • Solid MIDI Communications Infrastructure: Sets the industry standard for reliable and robust MIDI interactions over Network, Bluetooth and USB. • Active Community of Authors: A vibrant ecosystem supporting legacy and current music synthesizers, sound engines, DAWs, and all MIDI-controlled devices. • Extensive User Layout Library: More than 350 layouts for over 80 manufacturers, contributed by the Community. • Comprehensive Support: Whether you're just starting or tackling complex MIDI implementations, with the Community we are here to assist. • MIDI Designer's 'Superpowers': A suite of powerful features exclusive to MIDI Designer that we have developed over the last 10+ years, including: • Ableton Link and Link Control Loopers • Supercontrols and subcontrols as the basis for many features (with no scripting!): • Snap sub to value over time • Sequential subs • Subcontrol chaining • Button groups (radio buttons) with Bounceback™ • Steppers • Live Transpose • Group Presets • Named Ticks • Accelerometer • Simplified Sysex Messages with variables and bit changers • Snap to Value over Time • Global Presets • Pedalboards • Popup Panels (Show/Hide) • Two-up Page Layout for iPad/Mac • Streambyter Plugin by Audeonic for advanced MIDI transformation MDPx is easy to use, infinitely flexible and customizable, and battle-tested in performance. It's the only professional-grade MIDI controller built from the ground up for iOS to control ANYTHING via MIDI. dream | create | play COMMUNITY The MIDI Designer Community has built layouts for popular MIDI targets. Here are just a few: • Ableton Live • Air Music Tech: Xpand!2 • Arturia: Synclavier V, Analog Lab 4 • Audiofier: Riffendium • Chase Bliss: Mood MKII, Reverse Mode C, Thermae • Clavia: NORD LEAD 4 • DSI: Prophet 12 • Elektron: Octatrack MKII • E-MU: Planet Phatt • Eventide: Pitchfactor, Modfactor • Fractal: Axe-FX • Hauptwerk: St. Anne's Symphonic Organ • Kawai: K1, K1r • Korg: Volca Series, 707 • Line 6: POD X3, POD XT, POD HD500, POD Go • Meris: Enzo, Polymoon • M-Audio: Venom • Novation: MiniNova • Moog: Voyager, Animoog, Little Phatty, Slim Phatty, MF-104m Analog Delay • Omnisphere • Pigtronix: Infinity Looper • Roland: Jupiter-Xm, RD-2000, RD-88, FA-06/FA-07/FA-08, VG-99, JX-3P, JX-8P, MKS-30, MKS-50, MKS-80 • Sample Logic: Morphestra 2 • Sonokinetic: Noir • Soundiron: Steel Tones • TC Electronic: Nova Drive NDR-1 • ValhallaDSP: ÜberMod, VintageVerb, FreqEcho, Shimmer, Room • Yamaha: DX7 (TX7), TQ5, SY77 (TG77), DX21, Reface DX, AN200/PLG-100AN/AN1X FIND OUT MORE Web: midiDesigner.com/mdpx Community Layouts: midiDesigner.com/community Manual: midiDesigner.com/manual EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

NERD Synth A2x + AUv3

This virtual analog synthesizer offers a powerful and intuitive sound design experience, inspired by classic hardware. Explore over 40 classic waveforms, a versatile arpeggiator, step sequencer, and lush effects to craft unique electronic music.

Highlights
  • Virtual Analog Synthesizer
  • 40+ Classic Waveforms
  • Arpeggiator
  • Step Sequencer
  • Lush Effects Suite
  • Four-voice Unison
  • AUv3 Plugin Support
Features
Read full description

Inspired by the classic sounds of the Nord Lead A1** This is not a Rompler. This is a SYNTH.  "I’m impressed. The sounds are FAT, the effects are LUSH, and the interface is a JOY to use."  – Audio News Room "This is not a clone, this is BEYOND the hardware, it's a completely new, fantastic beast" – Jade Starr, How to App "An excellent release...app captures the soul of the Nord Lead A1 Synthesizer"  – Synth Anatomy "An iOS-based homage to a virtual analogue classic!" – Music Radar / Keyboard Magazine Not imitation, it's Innovation! https://audiokitpro.com/redsynth With Nerd Synth, you’ll have access to all 40+ of the classic lead A1 waveforms! Plus, we gave it some RAW MODERN POWER. FULLY LOADED w/ 550+ presets by Analog Matthew, Electronisounds, DMT Cymatics, Moby Pixel, Red Sky Lullaby, and more NOTE: This is a synth, and contains no hardware preset samples. All presets are completely original. One low price includes Lifetime License and all Features Easy to use. Easy to get great tone! NERD SYNTH A2X: • 64-voice, Retro VA-Synth • Include all 40+ of the Nord A1 waveforms • Arpeggiator! Classic Hardware-style Arp, with extra features • Vintage-style Step Sequencer that can be routed to specific layers • A proper filter envelope ADSR! • NEW: 2x Oversampled Oscillators • 3 LFOs. Fun Routings. LFOs can modify other LFOs • Microtonality, World Scales and Western Scales! • TouchPads! 2 fun assignable pads, -= Create NORD-style SUPER SAWS =- ++ Four-voice Unison with the tap of a button ++ 3 different algorithms: Regular, HYPER, and BEAST! "Astoundingly great sounding and intuitive synth app!" – The GarageBand Guide Modeled sound: It's like a time-capsule. Imagine if there were iPads in 2003? Complete with that "cold" VA sound that ruled the dance floors and stages ADDITIONAL FEATURES: • FX: Glorious Reverb, Analog Tape Delay, Distortion, Flanger, Chorus, Crush, and more. • On board "Record" button, no external hardware required • Works with a MIDI Keyboard EXCLUSIVE TO THIS APP: • "SUPER FM" wild pitch drop controls! Modeled after digital VA-Synths, complete with vintage digital aliasing for old-school vibe! • Crazy aggressive RING MODULATION distortion – It's like robots talking, or fighting? You decide! COOL: • iPad version has "stacked" views for maximum onscreen control! Tap the current Nav Button at the top to change the bottom view • This is a Premium App: No iAP, No Ads, No subscriptions! Use as a plug-in in DAWs like GarageBand & Logic for iPad, Cubasis, AUM, and more! NOTE: This is not a hardware clone, it's a completely new synth. If you're looking for a ROMpler like the "Stage" series, this app may not be for you. This is a SYNTH, not a rompler. All the presets here are new and original. Giving you fresh new sounds that are completely tweak-able This is not a 1:1 clone and will not load hardware presets. Please note that this app's sound is closer to the A1, which is a different sound from the NL1/NL2X. ** This app has no affiliation or endorsement by Clavia DMI AB. This app is not a clone of any their synths, including the Nord Lead and Nord Lead A1. While we were inspired by their wonderful and iconic work, this app is not trying to copy those synths. We created something completely new. It's a synth for synth nerds :) LEGAL STUFF: All product names and images, trademarks and artists names are the property of their respective owners, which are in no way associated or affiliated with the creators of this app, including AudioKit, AudioKit Pro, LLC, and the other contributors. Any use of these names and images does not imply any cooperation or endorsement by Clavia Digital Musical Instruments. Nord Lead, Nord Lead 2X, Nord, and Nord Lead A1 are Clavia trademarks and properties. We appreciate their amazing work in creating such classic and inspiring instruments.

Screenshots

MIDI Designer Pro X4 screens
NERD Synth A2x + AUv34 screens

Verdict

The call

The clearest difference is price: MIDI Designer Pro X at Free against NERD Synth A2x + AUv3's $5.99. MIDI Designer Pro X also leads on update cadence (every 5 days vs fortnightly). NERD Synth A2x + AUv3's advantage is in-app purchases (none vs 9) and rating (4.9 vs 4.6). On ads 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

CostPrice · In-app purchases · Ads · Monetization

MIDI Designer Pro X is free to download; NERD Synth A2x + AUv3 costs $5.99 up front. MIDI Designer Pro X sells 9 in-app purchases, starting at $1.49 per month. NERD Synth A2x + AUv3 asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

NERD Synth A2x + AUv3 holds the better App Store score, 4.9 against 4.6. That said, the two scores are not equally well evidenced: NERD Synth A2x + AUv3 has 1.4K ratings behind it against 271, so its average is the more settled of the two. Written reviews point the same way: 79% of MIDI Designer Pro X's written reviews are positive against 89% of NERD Synth A2x + AUv3's.

UpkeepUpdate frequency

MIDI Designer Pro X ships an update every 5 days, NERD Synth A2x + AUv3 fortnightly. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.

Scorecard8 real differences · 2 level
MIDI Designer Pro X versus NERD Synth A2x + AUv3: the parameters behind the verdict, then further details
ParameterMIDI Designer Pro XNERD Synth A2x + AUv3
PriceFree — better$5.99
Rating4.6 (271 ratings)4.9 (1.4K ratings) — better
Positive reviews78.8% of reviews89.0% of reviews — better
Number of ratings2711.4K — better
Update frequencyEvery 5 days — betterFortnightly
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemium — betterPaid
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS18.614.4 — better
Further details — not scored
Size209 MB242 MB
Age rating4+4+
DeveloperConfusion Studios LLCAudioKit Pro

Customer experience

MIDI Designer Pro X

All ratings271 ratings
Positive90.4%
Neutral2.2%
Negative7.4%
Written reviews165 reviews
Positive78.8%
Neutral4.2%
Negative17.0%

NERD Synth A2x + AUv3

All ratings1,342 ratings
Positive99.1%
Neutral0.6%
Negative0.3%
Written reviews163 reviews
Positive89.0%
Neutral7.4%
Negative3.7%

Bugs and requests

MIDI Designer Pro X

Not enough reviews yet to summarise bugs or requests.

NERD Synth A2x + AUv3

Reported bugs

2 issues
  • Doesn't fit properly in Logic Pro for iPad
  • Keyboard keys get stuck when using a controller

Requested features

4 requests
  • Dark mode option
  • Undo/redo functionality
  • Improved Logic Pro integration
  • Ability to change color scheme

In-app purchases

9 purchases

MIDI Designer Pro X

Subscriptions8
  • MDPx Premium iPhone Only$1.491 Month
  • MDPx Premium iPad Only$2.491 Month
  • MDPx Premium iPad, iPhone$2.991 Month
Show 5 more
  • MDPx Premium Mac, iPad, iPhone$4.991 Month
  • MDPx Premium iPhone Only$14.991 Year
  • MDPx Premium iPad Only$24.991 Year
  • MDPx Premium iPad, iPhone$29.991 Year
  • MDPx Premium Mac, iPad, iPhone$49.991 Year
One-time1
  • MDPx Premium Lifetime$124.99
None

NERD Synth A2x + AUv3

No in-app purchases

Questions

Is MIDI Designer Pro X free?
MIDI Designer Pro X is free to download, with in-app purchases available.
Is NERD Synth A2x + AUv3 free?
NERD Synth A2x + AUv3 costs $5.99, with no in-app purchases.
Which has better reviews, MIDI Designer Pro X or NERD Synth A2x + AUv3?
NERD Synth A2x + AUv3 is rated higher. MIDI Designer Pro X averages 4.6 out of 5 from 271 ratings, while NERD Synth A2x + AUv3 averages 4.9 from 1.4K ratings.
Do MIDI Designer Pro X or NERD Synth A2x + AUv3 have ads?
Neither MIDI Designer Pro X nor NERD Synth A2x + AUv3 shows ads.
Which is updated more often, MIDI Designer Pro X or NERD Synth A2x + AUv3?
MIDI Designer Pro X ships an update every 5 days, and NERD Synth A2x + AUv3 fortnightly. Most recently, MIDI Designer Pro X was updated on November 1, 2026 and NERD Synth A2x + AUv3 on October 30, 2026.

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