ChordMaps2 vs FormKey
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ChordMaps2
This music app allows musicians, songwriters, educators, and students to explore and improvise chord progressions, melody, and bass lines. It utilizes "Musical Maps" for intuitive chord exploration and can function as a MIDI controller for external synth apps.
- Explore chord progressions on Musical Maps
- Improvise melody and bass lines
- Supports major and minor keys
- MIDI controller functionality
- Demonstrate music theory concepts
- Create ear-training exercises
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ChordMaps2 is a music app for iPad which allows musicians, songwriters, music educators, and students to explore and improvise chord progressions, melody lines, and bass lines, in both major and minor keys, most of the time tapping with just one or two fingers. The most powerful feature of ChordMaps2 is that users can explore and play common chord progressions by touching chord locations on "Musical Maps." You can work with ChordMaps2 as a... Songwriter - to explore melody lines, bass lines, and chord progressions when you are away from your guitar or keyboard. Music Educator - to demonstrate principles of music theory, (including major and minor scales, diatonic and secondary chords, common chord progressions like IV-V-I, ii-V-I, I-vi-IV-V, I-V-vi-IV, etc.) You can also create spontaneous ear-training exercises, and explore melodic lines and chord progressions with students in an interactive environment. MIDI Musician - to tap out chord sequences and hear them played by one or more of the synth apps on your iPad, or you can send the MIDI information out through a MIDI interface to a computer running a digital audio workstation (DAW) like GarageBand or Logic Pro. How ChordMaps2 Works... ChordMaps2 is a MIDI controller. It works by being paired with a synthesizer app that generates sound. (Example synth apps include ThumbJam, SampleTank, bs-16i, iM1, and many more.) ChordMaps2 sends the MIDI signal; the synth app responds to the MIDI information and creates the audio. Video demonstrations of ChordMaps2 are found at the website. (Click the Developer Website link or visit Mugglinworks.com/ChordMaps2).
FormKey
This app is an intuitive MIDI controller that helps musicians improve by using shapes for notes and colors for octaves. Its unique isomorphic keys aid in pattern recognition and chord discovery, making music creation more accessible.
- Shape-based note input
- Color-coded octaves
- Isomorphic key layout
- Pattern recognition aid
- Chord discovery assistance
- Future update commitment
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Unlock your music potential. FormKey is the first music suite that helps you become the musician you've always imagined being, just by using it. INTRODUCING FORM Form is a new way to read and create music. Notes become shapes. Octaves become colors. Duration becomes a simple to read fraction. You can learn to read and play music in minutes. FormKey is the first release of the Form notation language, an open licensed music language designed to create instant music literacy. With the goal being to become a standard you'll see everywhere. THREE MODES: CREATE, LEARN, AND CONTROL • Create mode gives you a 16-track sequencer built on the classic drum machine workflow, modernized for today. Use your own AUv3 plugins or the three we built in to create full tracks from the ground up. • Learn lets you play and read your way through classical pieces while Form teaches you exactly what the music is doing, note by note. • Control turns FormKey into a MIDI controller for your external workflows, so it fits right into the setup you already have. THREE BRAND NEW AUv3 PLUGINS • Tone is a fully interactive subtractive synth that makes synthesis make sense. Every knob and connection is something you can hear and understand, so the architecture of a sound stops being a mystery. • Wave is a file-based sampler that lets you chop audio from your own device into something new. Slicing, shaping, and rearranging samples feel effortless instead of technical. • Pn0 is a modeled piano designed to sound rich while being incredibly simple to use • All 3 work in any host, so the instruments you learn in FormKey come with you wherever you go. SCALE MODE Reshape the keyboard to any of 26 scales, so every note you play stays in key. Choose from: • Major and minor: Major, Natural Minor, Melodic Minor, Harmonic Minor • Modes: Ionian, Dorian, Phrygian, Lydian, Mixolydian, Aeolian, Locrian • Pentatonic and blues: Major Pentatonic, Minor Pentatonic, Blues • Symmetric: Whole Tone, Whole-Half Diminished, Half-Whole Diminished, Augmented Hexatonic • World and exotic: Hungarian Minor, Neapolitan Minor, Byzantine, Enigmatic, Hirajoshi, In Sen, Kumoi, Iwato We've refined the interface across the app, making FormKey easier and more enjoyable to use. Every feature in FormKey is free to try. In celebration of our launch, $14.99 unlocks everything for the life of the app. We hope you love it as much as we do.
Verdict
The clearest difference is price: FormKey at Free against ChordMaps2's $9.99. FormKey also leads on update cadence (fortnightly vs every 6 months) and rating (4.3 vs 4.1). ChordMaps2's advantage is in-app purchases (none vs 1) and review sentiment (82% vs 50%). On ads, monetization model 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
FormKey is free to download; ChordMaps2 costs $9.99 up front. FormKey sells 1 one-off in-app purchase. ChordMaps2 asks for nothing beyond the download.
FormKey holds the better App Store score, 4.3 against 4.1. Both are backed by a comparable volume of ratings — 26 and 6 respectively. Written reviews complicate that: 82% of ChordMaps2's written reviews are positive against 50% of FormKey's, so the app with the better star average is not the one people write more warmly about.
ChordMaps2 ships an update every 6 months, FormKey fortnightly. The most recent releases landed on September 22, 2026 and September 19, 2026 respectively.
| Parameter | ChordMaps2 | FormKey |
|---|---|---|
| Price | $9.99 | Free — better |
| Rating | 4.1 (26 ratings) | 4.3 (6 ratings) — better |
| Positive reviews | 82.1% of reviews — better | 50.0% of reviews |
| Number of ratings | 26 — better | 6 |
| Update frequency | Every 6 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Paid |
| Devices | iPad | iPad |
| Requires iOS | 16.6 — better | 18.6 |
| Further details — not scored | ||
| Size | 9 MB | 86 MB |
| Age rating | 4+ | 4+ |
| Developer | Malcolm Mugglin | Polyhedra |
Customer experience
ChordMaps2
FormKey
In-app purchases
ChordMaps2
No in-app purchases
FormKey
- FormKey Full Unlock$14.99









