Comparison

ChordPolyPad vs MeloStock MTR

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

Head to head
About

ChordPolyPad

This app is a versatile MIDI chord player that allows users to create and play complex chord sets. It offers extensive customization for pads, MIDI controls, and chord generation, functioning as a standalone app or an AUv3 MIDI effect plugin.

Highlights
  • Standalone app and AUv3 MIDI effect plugin
  • 128 pads per preset
  • Customizable X/Y MIDI controllers
  • Advanced random chord generator
  • Internal and external MIDI support
  • Chord filtering and quantizing
  • Preset manager with in-app purchases
Features
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"ChordPolyPad" is a MIDI chords player that lets you create chord sets using a large internal library, any custom combination of notes, or randomly generated chords. Each preset contains either 8 groups of 16 pads or 2 groups of 64 pads, for a total of 128 pads. In addition to playing chords, each pad can generate customizable MIDI controls on its horizontal and vertical axes, allowing expressive real-time modulation. "ChordPolyPad" can be used as a standalone application or as an AUv3 MIDI effect plug-in. The app supports full internal and external MIDI input and output. An internal sound bank is included for immediate use. The AUv3 MIDI effect plug-in supports multiple instances. A compatible host is required and must support the Audio Unit v3 (AUv3) MIDI effect format. Hosts supporting AUv3 MIDI effect on iOS: Logic Pro, Cubasis, Beatmaker, AUM, Audiobus, NanoStudio, Auria Pro, apeMatrix. Hosts supporting AUv3 MIDI effect on macOS: Logic Pro 10.7 or later. Features: • Standalone application and AUv3 MIDI effect plug-in • 8 groups of 16 pads or 2 groups of 64 pads per preset (128 pads) • Assignable MIDI port and MIDI channel for each pad • Customizable X/Y controller per pad • Per-note velocity control for each chord • Strumming configuration per pad • Copy and paste for pads and groups • Drag and drop chords directly from the library • Chord filtering and quantizing based on the selected scale • Predefined scales and possibility to create custom scales • Advanced random chord generator with diverse musical moods featuring voice leading and context-aware harmonic progressions for naturally flowing compositions • Stop "Audio Background" automatically after inactivity (15 min, 30 min, 1 h, 2 h, or never) • Internal sound bank • Receive MIDI notes and control from external devices • Send MIDI to a virtual port usable as MIDI input by other "Core MIDI" compatible apps • Preset manager with support for in-app purchase packs • "Program Change" support • Preset sharing support by "AirDrop", "Mail", "Messages", and other supported services • Native iCloud support • "iCloud Drive" support in the "Files" app on iOS and "Finder" on macOS • Full support for "Windowed Apps" mode on iPad • Undo/Redo Supported MIDI connections: • Virtual "Core MIDI" connections between apps • Any compatible MIDI interface • MIDI over Wi-Fi • MIDI over Bluetooth

About

MeloStock MTR

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Before the tune in your head is gone. A multitrack recorder for writing songs on your own. One press of the red button: a new song, recording. No count-in, no click. ■ Overdubs that stay locked to the beat Takes line up with the click grid automatically, however many layers you stack. Split a waveform and nudge it in 5ms steps; tempo can change mid-playback and the click follows, and its on/off is remembered per song. A level meter shows if you are too quiet or clipping, and noise reduction tames room hiss and mains hum. Bluetooth earphones work too: their delay is measured automatically. ■ Record along with a song you love ・Import a karaoke track: tempo matched, bar 1 aligned, ready to overdub ・Split a song into vocals and backing, the singing on a new track below ・Backing in both ears, the original vocal in one ・It runs on your device; nothing is sent anywhere Use commercial music only from sources you obtained legitimately, and privately. ■ Everything you need is already inside ・A 9-pad sampler with ~500 sounds, or sample from the mic (up to 60s) ・Step sequencer with swing ・Turn a pattern into audio with one tap ・Lift pads from another song ・10 effects including EQ, reverb, delay and compression ・Five click sounds, with volume and pan ・A standalone metronome in the song list ■ Write the chart as you record ・All 12 roots, plus m, 7, M7, sus4, dim, add9 and slash chords ・Double-tap a measure for rhythm notation, beamed automatically ・Long-press a measure for its own time signature; transpose in one tap ・Rehearsal marks, D.C., Fine, dynamics and rit. anywhere, any size or colour ・Lyrics under the chords, on screen and in print ・Print to A4, 1 to 15 rows per sheet ■ Rearrange the song afterwards Add a chorus, shorten an interlude or open room to record into later: choose a range of measures and repeat, remove or insert blank space across every track at once. Markers move with it, and Undo puts it back. ■ Shape it until it's right ・Waveform editing: trim, cut, gain, quantize ・Re-record only the part you select ・The take before a re-record is kept, to compare and adopt ・Automatic harmony a third, fifth or octave above any track ・Marks, loop playback, punch in/out, copy measures, bounce tracks ・Change the whole song's key and tempo, non-destructively ・Fold tracks into groups ■ Hear it before you export Match the loudness of released music: streaming (−14 LUFS) or louder (−9 LUFS), measured first, so it holds up on a phone speaker. For colour, choose Pop, Acoustic or Warm mastering, 0–100%, then export to M4A or WAV with a 1–5 second fade. Each track can also go out as a ZIP — same length and start, tempo in the name, ready for a DAW. ■ Listen back to a rehearsal, straight through Line songs up in a playlist and they play one after another with a 1–2 second gap — record each song with Quick Rec, then play the whole lot back. Make as many playlists as you like and add a song by swiping it right. Skip 5 seconds either way, and mark a spot to come back to. A playlist can be sent to others: as one M4A it plays straight from a message, or song by song as a ZIP. ■ Playback carries on with the screen off Title and tempo appear on the lock screen, earphones or car, with play and pause. ■ A tuner is built in Chromatic, guitar (Standard, Drop D, Open G/D/E/C, DADGAD) and sanshin, reference pitch 415–466 Hz. ■ Lyrics and ideas in the same place Notes with photos and PDFs, and voice input for a lyric you don't want to lose. ■ Stay organised Sort songs into folders, and folders inside folders. Swipe left to duplicate. Deleted songs are kept for 30 days. ■ Share a song as a single file Send it by AirDrop, email or iCloud; whoever receives it can carry on, or import just the tracks they need. Each song can back itself up to iCloud Drive (a new song starts off). ■ English and Japanese Switch anytime from the in-app menu; the guide follows. Made a mistake? Shake to undo. Start with Quick Rec: capture one phrase.

Screenshots

ChordPolyPad3 screens
MeloStock MTR4 screens

Verdict

The call

The clearest difference is price: MeloStock MTR at $2.99 against ChordPolyPad's $17.99. MeloStock MTR also leads on in-app purchases (none vs 3) and update cadence (every 3 days vs every 2 months). ChordPolyPad's advantage is device support (4 vs 2). On ads 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

ChordPolyPad costs $17.99 and MeloStock MTR $2.99 up front. ChordPolyPad sells 3 one-off in-app purchases. MeloStock MTR asks for nothing beyond the download.

UpkeepUpdate frequency

ChordPolyPad ships an update every 2 months, MeloStock MTR every 3 days. The most recent releases landed on November 1, 2026 and October 31, 2026 respectively.

Scorecard4 real differences · 6 level
ChordPolyPad versus MeloStock MTR: the parameters behind the verdict, then further details
ParameterChordPolyPadMeloStock MTR
Price$17.99$2.99 — better
Rating4.6 (51 ratings) — better—
Positive reviews92.1% of reviews—
Number of ratings51 — better—
Update frequencyEvery 2 monthsEvery 3 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad
Requires iOS15.0 — better16.0
Further details — not scored
Size54 MB44 MB
Age rating4+4+
DeveloperLaurent ColsonNOBUHIRO MIYARA

In-app purchases

3 purchases

ChordPolyPad

One-time3
  • Retro Pop$4.99
  • Clubwave$4.99
  • Liminal Spaces$4.99
None

MeloStock MTR

No in-app purchases

Questions

Is ChordPolyPad free?
ChordPolyPad costs $17.99, and also offers in-app purchases.
Is MeloStock MTR free?
MeloStock MTR costs $2.99, with no in-app purchases.
Do ChordPolyPad or MeloStock MTR have ads?
Neither ChordPolyPad nor MeloStock MTR shows ads.
Which is updated more often, ChordPolyPad or MeloStock MTR?
ChordPolyPad ships an update every 2 months, and MeloStock MTR every 3 days. Most recently, ChordPolyPad was updated on November 1, 2026 and MeloStock MTR on October 31, 2026.

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