# Prospero Audio vs Cantus

The clearest difference is in-app purchases: Cantus at none against Prospero Audio's 1. Cantus also leads on iOS requirement (15.0 vs 26.0). On price, ads and device support there is nothing between them.

Both are free to download. Prospero Audio sells 1 one-off in-app purchase. Cantus asks for nothing beyond the download.

## The numbers

| Metric | Prospero Audio | Cantus |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/cantus-voicing-lab/id6772984019/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | — | Every 5 days |
| Monetization | — | Free |
| Size | 2 MB | 3 MB |
| Requires iOS | 26.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Brenton Mumford](https://appshunter.io/developer/1878555567) | [Jason Zachariah](https://appshunter.io/developer/1896513710) |

## What reviewers say

### Prospero Audio

[App page](https://appshunter.io/ios/app/prospero-audio/id6759607053)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Go Pro! | $6.99 | one-time |


### Cantus

[App page](https://appshunter.io/ios/app/cantus-voicing-lab/id6772984019)

This interactive tool helps musicians explore harmony and chord voicings on a virtual piano. It allows users to visualize how notes move within chords, understand modal relationships, and develop a feel for harmony through focused practice.

**Highlights:** Interactive chord and voicing exploration, Piano keyboard visualization, Modal and scale-based harmony practice, Voice-leading movement analysis, Tone.js audio playback, Account-free operation

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Prospero Audio free?

Prospero Audio is free to download, with in-app purchases available.

### Is Cantus free?

Cantus is free to download, with no in-app purchases.

### Do Prospero Audio or Cantus have ads?

Neither Prospero Audio nor Cantus shows ads.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*