Comparison

SoundPrism Pro vs ChordPolyPad

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

Head to head
About

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.

Highlights
  • Professional composition tool
  • MIDI controller
  • Harmonic sound texture generator
  • Visualize musical relationships
  • Control VSTis and synthesizers
  • Accelerometer input for MIDI CC
Features
Read full description

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

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
Read full description

"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

SoundPrism Pro4 screens
ChordPolyPad3 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard5 real differences · 5 level
SoundPrism Pro versus ChordPolyPad: the parameters behind the verdict, then further details
ParameterSoundPrism ProChordPolyPad
Price$4.99 — better$17.99
Rating4.3 (53 ratings)4.6 (51 ratings) — better
Positive reviews83.0% of reviews92.1% of reviews — better
Number of ratings53 — better51
Update frequencyEvery 3 monthsEvery 2 months — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Mac — better
Requires iOS9.0 — better15.0
Further details — not scored
Size136 MB54 MB
Age rating4+4+
DeveloperGrace Cloud GmbHLaurent Colson

Customer experience

SoundPrism Pro

All ratings53 ratings
Positive81.1%
Neutral7.5%
Negative11.3%
Written reviews511 reviews
Positive83.0%
Neutral6.3%
Negative10.8%

ChordPolyPad

All ratings51 ratings
Positive92.2%
Neutral0.0%
Negative7.8%
Written reviews114 reviews
Positive92.1%
Neutral3.5%
Negative4.4%

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

10 purchases

SoundPrism Pro

One-time10
  • Guitar Sound Pack$0.99
  • Trance Soundpack Pro$0.99
  • Choir Soundpack$0.99
Show 7 more
  • 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
3 purchases

ChordPolyPad

One-time3
  • Retro Pop$4.99
  • Clubwave$4.99
  • Liminal Spaces$4.99

Questions

Is SoundPrism Pro free?
SoundPrism Pro costs $4.99, and also offers in-app purchases.
Is ChordPolyPad free?
ChordPolyPad costs $17.99, and also offers in-app purchases.
Which has better reviews, SoundPrism Pro or ChordPolyPad?
ChordPolyPad is rated higher. SoundPrism Pro averages 4.3 out of 5 from 53 ratings, while ChordPolyPad averages 4.6 from 51 ratings.
Do SoundPrism Pro or ChordPolyPad have ads?
Neither SoundPrism Pro nor ChordPolyPad shows ads.
Which is updated more often, SoundPrism Pro or ChordPolyPad?
SoundPrism Pro ships an update every 3 months, and ChordPolyPad every 2 months. Most recently, SoundPrism Pro was updated on October 21, 2026 and ChordPolyPad on October 15, 2026.

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