# 4D Gym vs Project Mood

The clearest difference is update cadence: Project Mood at every 3 weeks against 4D Gym's every 13 months. 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.

4D Gym ships an update every 13 months, Project Mood every 3 weeks. The most recent releases landed on October 10, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | 4D Gym | Project Mood |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 3 weeks** |
| Size | 31 MB | 38 MB |
| Requires iOS | **15.6** | 16.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [The Trustee for ACMO Family Trust](https://appshunter.io/developer/1779702716) | [Project Mood Pty Ltd](https://appshunter.io/developer/1796242245) |

## What reviewers say

### 4D Gym

[App page](https://appshunter.io/ios/app/4d-gym/id6738186399)

**Features:** macOS Compatibility

**In-app purchases:** none


### Project Mood

[App page](https://appshunter.io/ios/app/project-mood/id6741928549)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is 4D Gym free?

4D Gym is free to download, with no in-app purchases.

### Is Project Mood free?

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

### Do 4D Gym or Project Mood have ads?

Neither 4D Gym nor Project Mood shows ads.

### Which is updated more often, 4D Gym or Project Mood?

4D Gym ships an update every 13 months, and Project Mood every 3 weeks. Most recently, 4D Gym was updated on October 10, 2026 and Project Mood on October 4, 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.*