# Molecule Music vs Hark

The clearest difference is update cadence: Hark at every 2 days against Molecule Music's every 8 days. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Molecule Music sells 3 in-app purchases, starting at $1.99 per month and Hark sells 3 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

Molecule Music ships an update every 8 days, Hark every 2 days. Both last shipped on October 31, 2026.

## The numbers

| Metric | Molecule Music | Hark |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/hark-ear-training/id6809023239/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 8 days | **Every 2 days** |
| Monetization | — | Freemium |
| Size | 93 MB | 11 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Jean Reymond](https://appshunter.io/developer/1895823321) | [Ilia Usatov](https://appshunter.io/developer/1868442271) |

## What reviewers say

### Molecule Music

[App page](https://appshunter.io/ios/app/molecule-music/id6764536136)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 mois | $1.99 | per month |
| 6 mois | $8.99 | per 6 months |
| 1 an | $12.99 | per year |


### Hark

[App page](https://appshunter.io/ios/app/hark-ear-training/id6809023239)

This app trains musicians to identify notes within a musical key, focusing on their relationship to the tonic. It offers various training modes, including single notes, melodies, and chord progressions, with hands-free operation for convenient practice.

**Highlights:** Identify notes as scale degrees, Hands-free training mode, Multiple training modes (degrees, melodies, chords, progressions), Visual staff with colored notes, Explore any note in any key, Multiple instrument sounds

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Hark Pro — Monthly | $3.99 | per month |
| Hark Pro — Yearly | $11.99 | per year |
| Hark Pro | $19.99 | one-time |


## Frequently asked questions

### Is Molecule Music free?

Molecule Music is free to download, with in-app purchases available.

### Is Hark free?

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

### Do Molecule Music or Hark have ads?

Neither Molecule Music nor Hark shows ads.

### Which is updated more often, Molecule Music or Hark?

Molecule Music ships an update every 8 days, and Hark every 2 days. Most recently, Molecule Music was updated on October 31, 2026 and Hark 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.*