ChordPolyPad vs ChoirZone
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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
ChoirZone
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ChoirZone is your personal practice studio for choir singing. Bring your score, learn your part, and walk into rehearsal ready. PRACTICE STUDIO See the sheet music and hear each voice at the same time, always in sync. Solo your part, mute the rest, slow it down, and loop the tricky four bars until they finally stick. Works with PDF and MusicXML scores. MARK UP YOUR MUSIC Add notes and musical stamps exactly where you need them, or draw freehand with your finger or Apple Pencil. Read continuously or page-by-page, like a book. TRAIN YOUR EAR AND VOICE On-device exercises that actually listen to you: interval training, sight-reading, rhythm, and a "drift" exercise that shows when you're slipping off pitch. Check your vocal range, warm up, and record yourself to listen back. All pitch detection runs privately on your device. YOUR WHOLE CHOIR IN ONE PLACE Share the set list, see who's coming to rehearsal, and point everyone at the exact score. Your singers arrive already knowing the notes — so rehearsal is for making music, not teaching parts. FREE TO PRACTISE ChoirZone is free for your own practice. Running a choir with members is available as a subscription. Made by choir singers, for choir singers. Support: support@choirzone.com Privacy: https://choirzone.com/privacy
Screenshots
Verdict
The clearest difference is price: ChoirZone at Free against ChordPolyPad's $17.99. ChoirZone also leads on in-app purchases (none vs 3) and update cadence (every 2 weeks vs every 2 months). 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
ChoirZone is free to download; ChordPolyPad costs $17.99 up front. ChordPolyPad sells 3 one-off in-app purchases. ChoirZone asks for nothing beyond the download.
ChordPolyPad ships an update every 2 months, ChoirZone every 2 weeks. The most recent releases landed on October 15, 2026 and October 8, 2026 respectively.
| Parameter | ChordPolyPad | ChoirZone |
|---|---|---|
| Price | $17.99 | Free — better |
| Rating | 4.6 (51 ratings) — better | — |
| Positive reviews | 92.1% of reviews | — |
| Number of ratings | 51 — better | — |
| Update frequency | Every 2 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 54 MB | 46 MB |
| Age rating | 4+ | 4+ |
| Developer | Laurent Colson | Trädtopp |
In-app purchases
ChordPolyPad
- Retro Pop$4.99
- Clubwave$4.99
- Liminal Spaces$4.99
ChoirZone
No in-app purchases









