Comparison

MIDI Designer Pro X vs Knob Lab

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

Knob Lab

This application transforms your iOS device into a versatile MIDI controller. It allows you to manage various DAWs and music software remotely via USB, WiFi, or Bluetooth. Create intricate control setups with a single rotary knob, affecting multiple MIDI destinations simultaneously.

Highlights
  • Remote DAW control
  • USB, WiFi, Bluetooth connectivity
  • Virtual MIDI support
  • Audiobus integration
  • Complex control mapping
  • iPad support
  • MIDI logger
Features
Read full description

Knob Lab turns your iPhone or iPad into a MIDI controller built around one idea: a single knob can do many things at once. ONE KNOB. MANY MOVES. Map a knob to up to 8 MIDI destinations. Each has its own range, direction, channel and color, so one turn can open a filter, pull the resonance back and bring the delay in over the second half of the sweep. BUILD YOUR OWN MACROS • Control Change, Program Change and Pitch Bend destinations • Name every knob and every destination, so a setup reads at a glance • Invert any range, or start a destination part-way through the turn • Rotate completely, snap to middle, pan left/right, or return to origin on release • A colored lane for every destination shows where each one is A LAYOUT FOR EVERY SETUP Start with one big knob, or unlock layouts with 2, 6 or 12 knobs on a single screen. PLAYS WITH EVERYTHING • Music apps on the same device, through Knob Lab's virtual MIDI output • Computers over Wi-Fi, with a network MIDI session • A Mac over USB or Bluetooth, with Sonic Logic Central • Class-compliant USB MIDI interfaces and synths plugged into your iPhone or iPad MADE FOR TOUCH Large, precise knobs, a quick guided start, Dark, Light and Neon themes, and full support for iPhone Duo in portrait and landscape. The one-knob layout is free. The 2, 6 and 12 knob layouts are in-app purchases, available one at a time or all together.

Screenshots

MIDI Designer Pro X4 screens
Knob Lab4 screens

Verdict

The call

The clearest difference is update cadence: MIDI Designer Pro X at every 5 days against Knob Lab's every 4 months. MIDI Designer Pro X also leads on rating (4.6 vs 4.2) and ratings volume (272 vs 13). Knob Lab's advantage is iOS requirement (15.0 vs 18.6). On price, review sentiment, 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

Both are free to download. MIDI Designer Pro X sells 9 in-app purchases, starting at $1.49 per month and Knob Lab sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

MIDI Designer Pro X holds the better App Store score, 4.6 against 4.2. That said, the two scores are not equally well evidenced: MIDI Designer Pro X has 272 ratings behind it against 13, so its average is the more settled of the two. Written reviews complicate that: 79% of MIDI Designer Pro X's written reviews are positive against 85% of Knob Lab's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

MIDI Designer Pro X ships an update every 5 days, Knob Lab every 4 months. Both last shipped on November 6, 2026.

Scorecard4 real differences · 6 level
MIDI Designer Pro X versus Knob Lab: the parameters behind the verdict, then further details
ParameterMIDI Designer Pro XKnob Lab
PriceFreeFree
Rating4.6 (272 ratings) — better4.2 (13 ratings)
Positive reviews78.8% of reviews84.6% of reviews — better
Number of ratings272 — better13
Update frequencyEvery 5 days — betterEvery 4 months
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFree with in-app purchases
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS18.615.0 — better
Further details — not scored
Size209 MB66 MB
Age rating4+4+
DeveloperConfusion Studios LLCUri Nachmias

Customer experience

MIDI Designer Pro X

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

Knob Lab

All ratings12 ratings
Positive83.3%
Neutral8.3%
Negative8.3%
Written reviews13 reviews
Positive84.6%
Neutral0.0%
Negative15.4%

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
4 purchases

Knob Lab

One-time4
  • Two Knob Layout$0.99
  • Four/Six Knob Layout$0.99
  • Nine/Twelve knob layout.$0.99
Show 1 more
  • Unlock all layouts$1.99

Questions

Is MIDI Designer Pro X free?
MIDI Designer Pro X is free to download, with in-app purchases available.
Is Knob Lab free?
Knob Lab is free to download, with in-app purchases available.
Which has better reviews, MIDI Designer Pro X or Knob Lab?
MIDI Designer Pro X is rated higher. MIDI Designer Pro X averages 4.6 out of 5 from 272 ratings, while Knob Lab averages 4.2 from 13 ratings.
Do MIDI Designer Pro X or Knob Lab have ads?
Neither MIDI Designer Pro X nor Knob Lab shows ads.
Which is updated more often, MIDI Designer Pro X or Knob Lab?
MIDI Designer Pro X ships an update every 5 days, and Knob Lab every 4 months. Most recently, MIDI Designer Pro X was updated on November 6, 2026 and Knob Lab on November 6, 2026.

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