# Harmony Lab vs Chord Invaders

The clearest difference is update cadence: Chord Invaders at every 4 days against Harmony Lab's every 5 weeks. Chord Invaders also leads on iOS requirement (15.0 vs 17.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Harmony Lab sells 2 in-app purchases, starting at $1.99 per month and Chord Invaders sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Harmony Lab ships an update every 5 weeks, Chord Invaders every 4 days. The most recent releases landed on September 27, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Harmony Lab | Chord Invaders |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 4 days** |
| Size | 29 MB | 2 MB |
| Requires iOS | 17.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Sean Ray Dvir](https://appshunter.io/developer/1850830113) | [Neerav Mehta](https://appshunter.io/developer/1896774458) |

## What reviewers say

### Harmony Lab

[App page](https://appshunter.io/ios/app/harmony-labchord-progressions/id6766231122)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| No Ads | $1.99 | per month |
| Full Access | $4.99 | per month |


### Chord Invaders

[App page](https://appshunter.io/ios/app/chord-invaders/id6771198820)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock All Levels | $1.99 | one-time |


## Frequently asked questions

### Is Harmony Lab free?

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

### Is Chord Invaders free?

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

### Do Harmony Lab or Chord Invaders have ads?

Neither Harmony Lab nor Chord Invaders shows ads.

### Which is updated more often, Harmony Lab or Chord Invaders?

Harmony Lab ships an update every 5 weeks, and Chord Invaders every 4 days. Most recently, Harmony Lab was updated on September 27, 2026 and Chord Invaders on October 8, 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.*