# Cantus vs Rapper

The clearest difference is ads: Cantus at none against Rapper's shown. Cantus also leads on update cadence (every 5 days vs every 3 weeks) and device support (3 vs 1). On price and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Cantus ships an update every 5 days, Rapper every 3 weeks. The most recent releases landed on October 21, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Cantus | Rapper |
| --- | --- | --- |
| 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 | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 5 days** | Every 3 weeks |
| Monetization | Free | — |
| Size | 3 MB | 10 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [Jason Zachariah](https://appshunter.io/developer/1896513710) | [Konrad Sierzputowski](https://appshunter.io/developer/1871588728) |

## What reviewers say

### 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


### Rapper

[App page](https://appshunter.io/ios/app/rapper-ai-rap-maker/id6785290009)

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

**In-app purchases:** none


## Frequently asked questions

### Is Cantus free?

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

### Is Rapper free?

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

### Do Cantus or Rapper have ads?

Rapper shows ads; Cantus does not.

### Which is updated more often, Cantus or Rapper?

Cantus ships an update every 5 days, and Rapper every 3 weeks. Most recently, Cantus was updated on October 21, 2026 and Rapper on October 20, 2026.

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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.*