Comparison

Midi Controller vs Isotope MIDI Keyboard

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

Head to head
About

Midi Controller

Transform your iPhone or iPad into a versatile MIDI controller. Send notes, control changes, and program changes wirelessly or via USB to any compatible DAW or hardware. Customize your workspace with unlimited, dynamic controls.

Highlights
  • USB, WLAN, and Bluetooth connectivity
  • Customizable buttons, pads, and sliders
  • Send Notes, CC, and Program Change values
  • Works with macOS and CoreMidi compatible hardware
  • No additional software required
  • Dynamic control creation
Features
Read full description

MidiController turns your iPhone/iPad into a complete MIDI controller, that works over USB, WLAN or Bluetooth. No additional software needed! Send all possible Notes, Continuous Controller / Control Change and Program Change values to the connected device. Build your workspace from the ground up with unlimited, custom Pushes/Buttons and Sliders. All Pushes/Buttons and Sliders are completely customisable - customize every value of every control possible and how the control behaves. You can even create dynamic controls (e.g. Program Change values that count up or down). • Works with every macOS: From 10.5 (Leopard) up to the newest 10.15 (Catalina) • Works on every iPhone and iPad • Also works with external hardware (e.g. synths,...) that supports Apple (CoreMidi) • If your hardware/PC does not support CoreMidi, you can use an iPhone/iPad compatible MIDI-Interface as bridge to make MidiController work with ALL MIDI devices Works with every application that supports MIDI-Input. Example DAWs (Digital Audio Workstation): * Logic X Pro * Ableton Live * Avid Pro Tools * Propellerhead Reason * Steinberg Cubase * Cockos Reaper * and many more (in principle every application that supports midi input) ** NOTES ** • MidiController does not play any sound itself, it only sends out MIDI-Information to connected devices. • MidiController is primary created to work with macOS-Devices. If you want to use MidiController with hardware that does not support Apple CoreMidi, you might need an iPhone/iPad compatible MIDI-Interface as bridge. A MIDI interface typically connects to your iOS per lightning port and provides standard MIDI DIN ports to connect to your hardware. There are also bluetooth MIDI interfaces that connect wirelessly. • MidiController does not receive any MIDI-Information, it generates and sends them itself depending on the user-input. ______________________________________________ APP USAGE INFO & MIDI CONTROLLER SUBSCRIPTION DETAILS Should you choose to upgrade to a midi controller subscription, payment will be charged to your iTunes account at confirmation of purchase. Your subscription renews automatically unless cancelled at least 24 hours prior to the end of the current period, and cancellation of the current active subscription period is not allowed. Auto-renewal may be turned off in your Account Settings in iTunes after purchase. You can also manage your subscriptions in Account Settings after purchase. LICENSED APPLICATION END USER LICENSE AGREEMENT: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Midi Controller Terms of Service: https://learned-romano-d09.notion.site/Terms-Conditions-9fc801bf71f94e4cae7b31b72c7e13e3 Midi Controller Privacy Policy: https://learned-romano-d09.notion.site/Privacy-Policy-ee4011f149ac417bbedbfea3f0250a96

About

Isotope MIDI Keyboard

This app offers an intuitive and accessible way to play music and learn music theory. Its unique isomorphic grid layout simplifies chord playing and understanding note relationships, making it ideal for both beginners and experienced musicians.

Highlights
  • Isomorphic grid layout for intuitive playing
  • Built-in Element sound engine
  • Audio Unit v3 plugin support
  • MIDI and MIDI over Bluetooth connectivity
  • Velocity-based touch and accelerometer input
  • Customizable themes and layouts
Features
Read full description

Isotope is an isomorphic MIDI keyboard app for iOS. Isotope makes playing music fun and intuitive, while also making music theory more accessible. Unlike traditional keyboard, Isotope's isomorphic grid layout is based on mathematical and geometrical properties of sound itself. When you play it, it's much more intuitive. When you want to learn about music, it shows how notes relate to one another. # Isomorphic Keyboard - If the interval stays the same, the form of your hand stays the same. For instance, when you put your first finger on the C, third finger on the E and the second finger on the G, it's the C major chord. Now that your fingers are in a triangle, if you just go up by one row, now it becomes the F major chord. - Square-based isomorphic keyboards like Isotope resembles stringed instruments tuned in perfect 4th apart from one string to the next. Therefore, if you have an experience in playing stringed instruments like the guitar, the bass, the violin, or the cello, you will get learn to play Isotope quickly. # Element - Built-in Sound Engine for Isotope - Available as an Audio Unit v3 plugin - Element has a versatile sound characteristics resembles double bass and bass guitars in the lower range, electric piano in the mid range and woodwind in the higher frequency range. # Connectivity - Supports MIDI (Garageband, Drambo, FL Studio Mobile etcs.) - MIDI over Bluetooth (For connecting Isotope to your computers / or any other devices that support MIDI over Bluetooth) # Usability - Multi-window and Slide Over support on iPadOS - Velocity based on touch area and accelerometer - 3rd party Audio Unit instrument plugins # Customizability - Row Interval adjustment - Fully customizable themes - Resizable buttons / app windows

Screenshots

Midi Controller4 screens
Isotope MIDI Keyboard4 screens

Verdict

The call

The clearest difference is price: Midi Controller at Free against Isotope MIDI Keyboard's $6.99. Midi Controller also leads on ratings volume (42 vs 10). Isotope MIDI Keyboard's advantage is rating (4.9 vs 4.1) and review sentiment (80% vs 41%). On ads, device support and iOS requirement 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 Controller is free to download; Isotope MIDI Keyboard costs $6.99 up front. Midi Controller sells 2 in-app purchases, starting at $3.99 per month. Isotope MIDI Keyboard asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Isotope MIDI Keyboard holds the better App Store score, 4.9 against 4.1. Both are backed by a comparable volume of ratings — 42 and 10 respectively. Written reviews point the same way: 41% of Midi Controller's written reviews are positive against 80% of Isotope MIDI Keyboard's.

UpkeepUpdate frequency

Midi Controller ships an update every 7 months, Isotope MIDI Keyboard every 2 days. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

Scorecard7 real differences · 3 level
Midi Controller versus Isotope MIDI Keyboard: the parameters behind the verdict, then further details
ParameterMidi ControllerIsotope MIDI Keyboard
PriceFree — better$6.99
Rating4.1 (42 ratings)4.9 (10 ratings) — better
Positive reviews40.9% of reviews80.0% of reviews — better
Number of ratings42 — better10
Update frequencyEvery 7 monthsEvery 2 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.016.0 — better
Further details — not scored
Size11 MB3 MB
Age rating4+4+
DeveloperMizo LLCJaewon Choi

Customer experience

Midi Controller

All ratings42 ratings
Positive76.2%
Neutral7.1%
Negative16.7%
Written reviews22 reviews
Positive40.9%
Neutral18.2%
Negative40.9%

Isotope MIDI Keyboard

All ratings10 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews10 reviews
Positive80.0%
Neutral10.0%
Negative10.0%

In-app purchases

2 purchases

Midi Controller

Subscriptions1
  • Monthly: MIDI Controller7 Days trial$3.991 Month
One-time1
  • Lifetime: MIDI Controller$29.99
None

Isotope MIDI Keyboard

No in-app purchases

Questions

Is Midi Controller free?
Midi Controller is free to download, with in-app purchases available.
Is Isotope MIDI Keyboard free?
Isotope MIDI Keyboard costs $6.99, with no in-app purchases.
Which has better reviews, Midi Controller or Isotope MIDI Keyboard?
Isotope MIDI Keyboard is rated higher. Midi Controller averages 4.1 out of 5 from 42 ratings, while Isotope MIDI Keyboard averages 4.9 from 10 ratings.
Do Midi Controller or Isotope MIDI Keyboard have ads?
Neither Midi Controller nor Isotope MIDI Keyboard shows ads.
Which is updated more often, Midi Controller or Isotope MIDI Keyboard?
Midi Controller ships an update every 7 months, and Isotope MIDI Keyboard every 2 days. Most recently, Midi Controller was updated on November 6, 2026 and Isotope MIDI Keyboard on November 3, 2026.

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