# 3tra vs The Mood Lab

3tra and The Mood Lab are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

## The numbers

| Metric | 3tra | The Mood Lab |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | — |
| Size | 37 MB | 75 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [INSTA KIT FOR SOFTWARE SOLUTIONS](https://appshunter.io/developer/1703569170) | [EMCAN-TEC](https://appshunter.io/developer/1649090170) |

## What reviewers say

### 3tra

[App page](https://appshunter.io/ios/app/3tra/id6751044991)

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

**In-app purchases:** none


### The Mood Lab

[App page](https://appshunter.io/ios/app/the-mood-lab/id6770554752)

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

**In-app purchases:** none


## Frequently asked questions

### Is 3tra free?

3tra is free to download, with no in-app purchases.

### Is The Mood Lab free?

The Mood Lab is free to download, with no in-app purchases.

### Do 3tra or The Mood Lab have ads?

Neither 3tra nor The Mood Lab shows ads.

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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.*