# Cantus vs Prog Metronome

The clearest difference is update cadence: Cantus at every 5 days against Prog Metronome's every 2 weeks. On price, ads, in-app purchases and device support 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, Prog Metronome every 2 weeks. Both last shipped on October 31, 2026.

## The numbers

| Metric | Cantus | Prog Metronome |
| --- | --- | --- |
| 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 | No |
| Update frequency | **Every 5 days** | Every 2 weeks |
| Monetization | Free | — |
| Size | 3 MB | 39 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Jason Zachariah](https://appshunter.io/developer/1896513710) | [Zeyu Chen](https://appshunter.io/developer/6776389034) |

## 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


### Prog Metronome

[App page](https://appshunter.io/ios/app/prog-metronome/id6776389032)

**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 Prog Metronome free?

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

### Do Cantus or Prog Metronome have ads?

Neither Cantus nor Prog Metronome shows ads.

### Which is updated more often, Cantus or Prog Metronome?

Cantus ships an update every 5 days, and Prog Metronome every 2 weeks. Most recently, Cantus was updated on October 31, 2026 and Prog Metronome on October 31, 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.*