# Harmony Lab vs OpenDeck DJ

The clearest difference is in-app purchases: OpenDeck DJ at none against Harmony Lab's 6. OpenDeck DJ also leads on update cadence (every 3 days vs every 2 months) and iOS requirement (15.0 vs 17.6). On price, ads and device support there is nothing between them.

Both are free to download. Harmony Lab sells 6 in-app purchases, starting at $1.99 per month. OpenDeck DJ asks for nothing beyond the download.

Harmony Lab ships an update every 2 months, OpenDeck DJ every 3 days. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Harmony Lab | OpenDeck DJ |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 days** |
| Size | 33 MB | 20 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) | [Dan Newcome](https://appshunter.io/developer/1892264671) |

## 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 (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| No Ads | $1.99 | per month |
| Full Access | $4.99 | per month |
| Melodic Mind Standard Monthly | $7.99 | per month |
| Melodic Mind Pro Monthly | $11.99 | per month |
| Melodic Mind Standard Yearly | $59.99 | per year |
| Melodic Mind Pro Yearly | $89.99 | per year |


### OpenDeck DJ

[App page](https://appshunter.io/ios/app/opendeck-dj/id6807472453)

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

**In-app purchases:** none


## Frequently asked questions

### Is Harmony Lab free?

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

### Is OpenDeck DJ free?

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

### Do Harmony Lab or OpenDeck DJ have ads?

Neither Harmony Lab nor OpenDeck DJ shows ads.

### Which is updated more often, Harmony Lab or OpenDeck DJ?

Harmony Lab ships an update every 2 months, and OpenDeck DJ every 3 days. Most recently, Harmony Lab was updated on November 5, 2026 and OpenDeck DJ 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.*