SoundPrism Pro vs ChordPolyPad
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SoundPrism Pro
This app is a professional composition tool and MIDI controller that generates harmonic sound textures and cinematic tracks. It offers a new way to control synthesizers and visualize musical relationships, allowing users to compose film scores, create loops, and generate music for video games.
- Professional composition tool
- MIDI controller
- Harmonic sound texture generator
- Visualize musical relationships
- Control VSTis and synthesizers
- Accelerometer input for MIDI CC
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What is SoundPrism Pro? * a professional composition tool and midi controller * an interactive generator for harmonic sound textures and epic cinema tracks * a completely new way to control existing VSTis, synthesizers and sound modules * an intuitive way to visualize and internalize musical relationships * an innovative way to interact musically with geometric pitch space visualizations * a way to define awesome pitch layouts by using the new PitchClassShifter What can I do with it? * compose film soundtracks * find new chord progressions for your tracks * create loops with advanced tonality * compose epic sound textures for your next video game * provide your media presentations with self made music Where do I find detailed info? * watch the Trailer (composed with SoundPrism Pro) at www.youtube.com/audanika * check out the interactive manual at www.soundprismhowto.com * read our blog audanika.tumblr.com to find out more about the scientific theory behind * try SoundPrism standard to test SoundPrism (without MIDI and PitchClassShifter) ***New Expression feature:*** - SoundPrism Pro now supports Accelerometer Input to control MIDI CC Events - go to out www.soundprismhowto.com to find out more What our users are saying: "I urge all of you to pick up Sound Prism Pro- one of my top 3 music apps. Now with more midi!" Jim Guthrie (composer of Swords&Sworcery:EP) -http://bit.ly/hUiylq "I had a GREAT time playing it before and will make a video of myself playing later today!! I LOVE it!!" Jordan Rudess via Skype "It took less than a few minutes to create verse and chorus melodies that work together. In this quick demo I used some free Roland TR-808 samples and a software Korg Wavestation through D16′s Devastor distortion. Truly inspirational." Oliver Chesler - http://bit.ly/hucUWf "I'm not a keyboard player, and the way this app already plays the chords for you, you get a whole new sound from the Sound Module you use." Comment on PalmSounds http://bit.ly/hGv53g "SoundPrism Pro as a wireless midi controller for iPad is pretty darned useful" Paul Bailey via Twitter "I own many midi apps, SoundPrism Pro is by far the best a Beautiful app Thank you" Cane Creek via Twitter
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
Screenshots
Verdict
The clearest difference is price: SoundPrism Pro at $4.99 against ChordPolyPad's $17.99. SoundPrism Pro also leads on iOS requirement (9.0 vs 15.0). ChordPolyPad's advantage is rating (4.6 vs 4.3) and update cadence (every 2 months vs every 3 months). On ratings volume, ads, in-app purchases and monetization model 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
SoundPrism Pro costs $4.99 and ChordPolyPad $17.99 up front. SoundPrism Pro sells 10 one-off in-app purchases and ChordPolyPad sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
ChordPolyPad holds the better App Store score, 4.6 against 4.3. Both are backed by a comparable volume of ratings — 53 and 51 respectively. Written reviews point the same way: 83% of SoundPrism Pro's written reviews are positive against 92% of ChordPolyPad's.
SoundPrism Pro ships an update every 3 months, ChordPolyPad every 2 months. The most recent releases landed on October 21, 2026 and October 15, 2026 respectively.
| Parameter | SoundPrism Pro | ChordPolyPad |
|---|---|---|
| Price | $4.99 — better | $17.99 |
| Rating | 4.3 (53 ratings) | 4.6 (51 ratings) — better |
| Positive reviews | 83.0% of reviews | 92.1% of reviews — better |
| Number of ratings | 53 — better | 51 |
| Update frequency | Every 3 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 9.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 136 MB | 54 MB |
| Age rating | 4+ | 4+ |
| Developer | Grace Cloud GmbH | Laurent Colson |
Customer experience
SoundPrism Pro
ChordPolyPad
Bugs and requests
SoundPrism Pro
Reported bugs
3 issues- Audiobus and inter-app MIDI connectivity problems
- Inconsistent performance across different iOS devices
- Issues with exporting and sharing recorded content
Requested features
5 requests- Built-in arpeggiator and looping capabilities
- More sound customization and synthesis options
- Improved recording and playback functionality
- Expanded MIDI integration and control options
- Ability to create and save custom chord progressions
ChordPolyPad
Not enough reviews yet to summarise bugs or requests.
In-app purchases
SoundPrism Pro
- Guitar Sound Pack$0.99
- Trance Soundpack Pro$0.99
- Choir Soundpack$0.99
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- Organ SoundPack$0.99
- Airy Pad Sound Pack$0.99
- Euro Synth Sound Pack$0.99
- Lead Synth Sound Pack$0.99
- Midnight Skin$1.99
- Snow Skin$1.99
- Sound Bundle 1$1.99
ChordPolyPad
- Retro Pop$4.99
- Clubwave$4.99
- Liminal Spaces$4.99









