# pxSat3D vs USG APP

The clearest difference is in-app purchases: USG APP at none against pxSat3D's 2. USG APP also leads on update cadence (fortnightly vs every 3 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. pxSat3D sells 2 one-off in-app purchases. USG APP asks for nothing beyond the download.

pxSat3D ships an update every 3 months, USG APP fortnightly. The most recent releases landed on June 1, 2026 and May 17, 2026 respectively.

## The numbers

| Metric | pxSat3D | USG APP |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (2 ratings)](https://appshunter.io/ios/app/pxsat3d/id1493707854/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Fortnightly** |
| Monetization | Free with in-app purchases | — |
| Size | 12 MB | 34 MB |
| Requires iOS | **13.0** | 13.4 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [P'tit Xav](https://appshunter.io/developer/373775246) | [USG United Scientific Group](https://appshunter.io/developer/1782302883) |

## What reviewers say

### pxSat3D

[App page](https://appshunter.io/ios/app/pxsat3d/id1493707854)

Visualize real-time satellite orbits around Earth. Explore the density of specific satellite types in orbit. Performance may vary on older devices.

**Highlights:** Real-time satellite tracking, Visualize satellite orbits, Quantify satellite types, Space traffic visualization, Educational space data

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Tip | $0.99 | one-time |
| Tip | $2.99 | one-time |


### USG APP

[App page](https://appshunter.io/ios/app/usg-app/id6738779185)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is pxSat3D free?

pxSat3D is free to download, with in-app purchases available.

### Is USG APP free?

USG APP is free to download, with no in-app purchases.

### Do pxSat3D or USG APP have ads?

Neither pxSat3D nor USG APP shows ads.

### Which is updated more often, pxSat3D or USG APP?

pxSat3D ships an update every 3 months, and USG APP fortnightly. Most recently, pxSat3D was updated on June 1, 2026 and USG APP on May 17, 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.*