Comparison

MIDIKeys vs MIDI Designer Pro X

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

Head to head
About

MIDIKeys

This app acts as a virtual MIDI keyboard controller, allowing you to send MIDI messages to synthesizer apps and hardware. It offers customizable velocity, octave transposition, and tilt controls for expression.

Highlights
  • Virtual MIDI keyboard
  • Send MIDI messages
  • Octave transposition
  • Adjustable velocity
  • Tilt expression control
  • Customizable MIDI channel
Features
Read full description

MIDIKeys is a MIDI keyboard controller that can be used to send MIDI messages to synthesizer apps and hardware MIDI synthesizers. MIDIKeys doesn't produce any sound on its own, it is for playing hardware or software VST-style MIDI synthesizers via MIDI hardware interfaces connected to the iPhone dock connector or virtual MIDI instruments like IK Multimedia SampleTank® for iOS or ThumbJam running in the background on your iPhone. The entire range may be transposed up or down (up to a three octave limit) by touching the 8va -/+ buttons on the main screen. Touching the display for the transpose value between the octave shift buttons resets the transpose to C3 (60). Both fixed or variable note MIDI Note On event velocity based on touch position within the key are available as options on the settings page. While playing, you may also optionally send real-time volume, expression, modulation, or wind controller MIDI messages by tilting the iPhone/iPod Touch to the right or left. Set the transmit channel using the MIDI Channel slider. Any channel from 1-16 may be selected. Channel 1 is the default. Choose between "Omni" sending MIDI data to all CoreMIDI apps or "Virtual Port" sending to a named CoreMIDI virtual output port. When the "Virtual Port option is selected, MIDIKeys will show up as an input option labeled "MIDIKeys" in apps that support virtual ports like Sonosaurus ThumbJam and MIDIBridge. "Omni" mode is selected by default. Note-on events may be sent with either a fixed or variable velocity based on where you touch on the key. Set the maximum velocity using the Velocity slider. Any value from 0-127 may be selected. Default value is 100. Select between fixed or variable velocity mapped to the touch position using the selector. When the velocity is mapped to touch, the minimum velocity is approximately 10% of the value set on the Velocity slider and the max is 100% of the value. Touching lower or higher on the key (area below the black keys only for the white keys) results in lower or higher velocity values sent in the MIDI Note On event for the key. Black key highest velocity starts at the bottom of the key and gets lower as you touch higher. MIDIKeys can send Volume, Expression, Modulation, or Breath Control message by tilting the device to the right or left. Select a controller on the Tilt Controller selector. Default is no controller messages. When a controller is enabled, tilting the device to the right or left will send the selected controller messages to the external device. Values increase as the device is tilted farther to the right. You may set the tilt sensitivity using the Tilt Sensitivity slider. The range is from 1 to 4, with higher values being more sensitive. Default value is 1.5. If you ever have "stuck" notes, you may touch the "Shhh" icon on the main screen to send a MIDI "All Notes Off" message and stop the sounds. All settings are saved when exiting MIDIKeys and restored the next time it is run.

About

MIDI Designer Pro X

Create custom MIDI controllers for any MIDI-enabled hardware or software. Offers extensive customization, a large user-created layout library, and robust MIDI communication. Ideal for musicians and producers seeking a personalized control experience.

Highlights
  • Control any MIDI-enabled device
  • Network, Bluetooth, and USB MIDI
  • Extensive user layout library
  • Customizable control surfaces
  • Advanced MIDI transformation features
  • Ableton Link integration
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: apple.com/legal/internet-services/itunes/dev/stdeula

Screenshots

MIDIKeys2 screens
MIDI Designer Pro X4 screens

Verdict

The call

The clearest difference is rating: MIDI Designer Pro X at 4.6 against MIDIKeys's 3.4. MIDI Designer Pro X also leads on update cadence (every 11 days vs every 6 weeks) and ratings volume (269 vs 16). MIDIKeys's advantage is in-app purchases (none vs 14) and iOS requirement (10.0 vs 18.6). On price, 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

Both are free to download. MIDI Designer Pro X sells 14 in-app purchases, starting at $1.99 per month. MIDIKeys asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

MIDI Designer Pro X holds the better App Store score, 4.6 against 3.4. That said, the two scores are not equally well evidenced: MIDI Designer Pro X has 269 ratings behind it against 16, so its average is the more settled of the two. Written reviews point the same way: 70% of MIDIKeys's written reviews are positive against 79% of MIDI Designer Pro X's.

UpkeepUpdate frequency

MIDIKeys ships an update every 6 weeks, MIDI Designer Pro X every 11 days. The most recent releases landed on October 4, 2026 and October 12, 2026 respectively.

Scorecard7 real differences · 3 level
MIDIKeys versus MIDI Designer Pro X: the parameters behind the verdict, then further details
ParameterMIDIKeysMIDI Designer Pro X
PriceFreeFree
Rating3.4 (16 ratings)4.6 (269 ratings) — better
Positive reviews70.0% of reviews78.8% of reviews — better
Number of ratings16269 — better
Update frequencyEvery 6 weeksEvery 11 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFreemium
DevicesiPhone, iPodiPhone, iPad
Requires iOS10.0 — better18.6
Further details — not scored
Size6 MB205 MB
Age rating4+4+
DeveloperMichael EskinConfusion Studios LLC

Customer experience

MIDIKeys

All ratings16 ratings
Positive62.5%
Neutral0.0%
Negative37.5%
Written reviews20 reviews
Positive70.0%
Neutral5.0%
Negative25.0%

MIDI Designer Pro X

All ratings269 ratings
Positive90.3%
Neutral2.2%
Negative7.4%
Written reviews165 reviews
Positive78.8%
Neutral4.2%
Negative17.0%

In-app purchases

None

MIDIKeys

No in-app purchases

14 purchases

MIDI Designer Pro X

Subscriptions10
  • MDPx Premium iPhone Only$1.991 Month
  • MDPx Premium iPad Only$3.491 Month
  • MDPx Premium Mac Only$4.491 Month
Show 7 more
  • MDPx Premium iPad, iPhone$4.491 Month
  • MDPx Premium Mac, iPad, iPhone$7.991 Month
  • MDPx Premium iPhone Only$19.991 Year
  • MDPx Premium iPad Only$34.991 Year
  • MDPx Premium Mac Only$44.991 Year
  • MDPx Premium iPad, iPhone$44.991 Year
  • MDPx Premium Mac, iPad, iPhone$79.991 Year
One-time4
  • Extra Features Pack$4.99
  • Automatic Backups$4.99
  • Audeonic Stream Byter Plugin$4.99
Show 1 more
  • MDPx Premium Lifetime$199.99

Questions

Is MIDIKeys free?
MIDIKeys is free to download, with no in-app purchases.
Is MIDI Designer Pro X free?
MIDI Designer Pro X is free to download, with in-app purchases available.
Which has better reviews, MIDIKeys or MIDI Designer Pro X?
MIDI Designer Pro X is rated higher. MIDIKeys averages 3.4 out of 5 from 16 ratings, while MIDI Designer Pro X averages 4.6 from 269 ratings.
Do MIDIKeys or MIDI Designer Pro X have ads?
Neither MIDIKeys nor MIDI Designer Pro X shows ads.
Which is updated more often, MIDIKeys or MIDI Designer Pro X?
MIDIKeys ships an update every 6 weeks, and MIDI Designer Pro X every 11 days. Most recently, MIDIKeys was updated on October 4, 2026 and MIDI Designer Pro X on October 12, 2026.

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