# Zero Gravity App vs Althea

The clearest difference is in-app purchases: Zero Gravity App at none against Althea's 2. Zero Gravity App also leads on device support (3 vs 1) and iOS requirement (15.6 vs 18.0). Althea's advantage is update cadence (weekly vs every 42 months). On price and ads there is nothing between them.

Both are free to download. Althea sells 2 in-app purchases, starting at $6.99 per month. Zero Gravity App asks for nothing beyond the download.

Zero Gravity App ships an update every 42 months, Althea weekly. The most recent releases landed on October 26, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Zero Gravity App | Althea |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 42 months | **Weekly** |
| Size | 18 MB | 17 MB |
| Requires iOS | **15.6** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [Kostas Kousinovalis](https://appshunter.io/developer/762128160) | [SPYRIDON BENETOS](https://appshunter.io/developer/6792283775) |

## What reviewers say

### Zero Gravity App

[App page](https://appshunter.io/ios/app/zero-gravity-app/id1489242961)

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

**In-app purchases:** none


### Althea

[App page](https://appshunter.io/ios/app/althea-glp-1-tracker/id6792283773)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $6.99 | per month |
| Annual | $49.99 | per year |


## Frequently asked questions

### Is Zero Gravity App free?

Zero Gravity App is free to download, with no in-app purchases.

### Is Althea free?

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

### Do Zero Gravity App or Althea have ads?

Neither Zero Gravity App nor Althea shows ads.

### Which is updated more often, Zero Gravity App or Althea?

Zero Gravity App ships an update every 42 months, and Althea weekly. Most recently, Zero Gravity App was updated on October 26, 2026 and Althea 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.*