# 4D Gym vs Harmony Pilates Studio

The clearest difference is update cadence: Harmony Pilates Studio at every 3 months 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, Harmony Pilates Studio every 3 months. The most recent releases landed on October 25, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | 4D Gym | Harmony Pilates Studio |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 3 months** |
| Size | 31 MB | 55 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [The Trustee for ACMO Family Trust](https://appshunter.io/developer/1779702716) | [Momence, Inc.](https://appshunter.io/developer/1577856011) |

## What reviewers say

### 4D Gym

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Harmony Pilates Studio

[App page](https://appshunter.io/ios/app/harmony-pilates-studio/id6741926635)

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

**In-app purchases:** none


## Frequently asked questions

### Is 4D Gym free?

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

### Is Harmony Pilates Studio free?

Harmony Pilates Studio is free to download, with no in-app purchases.

### Do 4D Gym or Harmony Pilates Studio have ads?

Neither 4D Gym nor Harmony Pilates Studio shows ads.

### Which is updated more often, 4D Gym or Harmony Pilates Studio?

4D Gym ships an update every 13 months, and Harmony Pilates Studio every 3 months. Most recently, 4D Gym was updated on October 25, 2026 and Harmony Pilates Studio on October 12, 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.*