Polychord vs MMP1 Controller
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Polychord
Create music with an intuitive interface that makes playing chords easy for everyone. Explore songwriting, strum and solo with confidence, and even add auto-accompaniment. Advanced MIDI features allow integration with popular music production software.
- Play chords from diverse palettes
- Strum and solo in key
- Auto-accompaniment band feature
- MIDI control for DAWs
- Songwriting tools
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Polychord turns your iPad into a chord instrument — a full band at your fingertips. Nine chord circles hold every chord in your key — arranged so the right one is always under your fingers. Tap a circle to hear it, and the ring around it offers the colors: sevenths, sixths, suspensions. Strum across the keys like a harp. You can't hit a wrong note, and you never have to stop and think. Flip on Auto Accompany and a rhythm section falls in behind you: bass and drums that follow every chord change you make, in styles from folk to funk to krautrock. One finger becomes a band. When something good happens, hit record. Loop, layer, and bounce it to audio, or export multi-track MIDI with chords, strum, bass, arpeggiator, and drums on separate tracks, ready for your DAW. In the studio, Polychord comes with you. The AUv3 MIDI-effect plugin puts the chord grid inside DAWs like Logic Pro that support MIDI effects, and MIDI in and out means it can play — or be played by — everything else you own. Whether you've played for twenty years or never learned an instrument, Polychord closes the gap between imagining music and making it. FEATURES • Nine chord circles covering the full harmony of any major or minor key • Chord palettes for folk, jazz, gospel, bossa nova, soul, cinematic, and more • Strum keys with pitch bend • Auto Accompany: bass lines and drum patterns that follow your chords • Arpeggiator with adjustable direction, rate, and octave span • Built-in wavetable synth with ADSR envelopes, filter, delay, and bitcrusher • Record performances and bounce to audio • Multi-track MIDI export: chords, strum, bass, arpeggiator, and drums on separate tracks • MIDI out to any app or hardware; MIDI in to trigger chords from a keyboard • You can even split your MIDI output to trigger multiple instruments at once in DAWs like Logic • AUv3 MIDI-effect plugin: play the chord grid inside your favorite host • AUv3 works in DAWs like Logic Pro that support MIDI effect plug-ins Polychord is a one-time purchase. No subscription, no in-app purchases, no account. Your music stays yours.
MMP1 Controller
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MMP1 Controller is an iPad application that allows remote control of MMP1 Studio Monitor Management System parameters. With the MMP1 app you can easily adjust the monitor system while accurately assessing performance from anywhere in the studio.
Verdict
The clearest difference is price: MMP1 Controller at Free against Polychord's $9.99. MMP1 Controller also leads on iOS requirement (10.0 vs 15.0). Polychord's advantage is update cadence (every 2 months vs every 30 months). On ads, in-app purchases 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
MMP1 Controller is free to download; Polychord costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Polychord ships an update every 2 months, MMP1 Controller every 30 months. The most recent releases landed on October 24, 2026 and October 4, 2026 respectively.
| Parameter | Polychord | MMP1 Controller |
|---|---|---|
| Price | $9.99 | Free — better |
| Rating | 4.4 (39 ratings) — better | — |
| Positive reviews | 74.8% of reviews | — |
| Number of ratings | 39 — better | — |
| Update frequency | Every 2 months — better | Every 30 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPad | iPad |
| Requires iOS | 15.0 | 10.0 — better |
| Further details — not scored | ||
| Size | 23 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Apposite | Yamaha Corporation |
Bugs and requests
Polychord
Reported bugs
10 issues- App crashes during recording
- Incompatible with iOS 8+ on older devices
- MIDI off messages not sent properly
- Sporadic glitches with Logic Pro and GarageBand
- Sound occasionally disappears until app restart
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- Strum keys disappear or become unresponsive
- Record button resets project
- Chord release affects all sustained chords
- Visual glitches on Retina display
- App not receiving updates for compatibility
Requested features
20 requests- Custom chord creation and palette selection
- Copy and paste functionality
- Save and load configurations/presets
- Additional instrument sounds and drum kits
- Retina display support
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- Metronome and click track
- Recording improvements (overdub, undo)
- Visual chord progression tracker
- Velocity control via accelerometer
- Chord builder for custom chords
- Master tune control
- Extended chord types (M9, m9, M13, etc.)
- Slash chords support
- More scales (bebop, mixolydian, etc.)
- Strum keys with note labels
- Full iPad width strum section
- AUv3 plugin support
- Inverted chord options
- MIDI channel routing
- Audio copy/paste support
MMP1 Controller
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Polychord
No in-app purchases
MMP1 Controller
No in-app purchases









