# pxSat3D vs Infant Simulation System

The clearest difference is in-app purchases: Infant Simulation System at none against pxSat3D's 2. Infant Simulation System also leads on update cadence (every 11 days vs every 3 months). pxSat3D's advantage is device support (4 vs 2). On price, ads and iOS requirement there is nothing between them.

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

pxSat3D ships an update every 3 months, Infant Simulation System every 11 days. The most recent releases landed on October 18, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | pxSat3D | Infant Simulation System |
| --- | --- | --- |
| 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 | **Every 11 days** |
| Monetization | Free with in-app purchases | — |
| Size | 12 MB | 5 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [P'tit Xav](https://appshunter.io/developer/373775246) | [Solidusystems SA de CV](https://appshunter.io/developer/1373291923) |

## 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 |


### Infant Simulation System

[App page](https://appshunter.io/ios/app/infant-simulation-system/id1631897176)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is pxSat3D free?

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

### Is Infant Simulation System free?

Infant Simulation System is free to download, with no in-app purchases.

### Do pxSat3D or Infant Simulation System have ads?

Neither pxSat3D nor Infant Simulation System shows ads.

### Which is updated more often, pxSat3D or Infant Simulation System?

pxSat3D ships an update every 3 months, and Infant Simulation System every 11 days. Most recently, pxSat3D was updated on October 18, 2026 and Infant Simulation System on October 27, 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.*