# Interactive Solar System vs Learn About Stars

The clearest difference is price: Learn About Stars at Free against Interactive Solar System's $1.99. Interactive Solar System's advantage is in-app purchases (none vs 1) and iOS requirement (12.0 vs 15.1). On update cadence, ads and device support there is nothing between them.

Learn About Stars is free to download; Interactive Solar System costs $1.99 up front. Learn About Stars sells 1 one-off in-app purchase. Interactive Solar System asks for nothing beyond the download.

Interactive Solar System ships an update fortnightly, Learn About Stars every 3 weeks. The most recent releases landed on October 26, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Interactive Solar System | Learn About Stars |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Size | 52 MB | 48 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | iPad, Apple TV | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Ventura Educational Systems](https://appshunter.io/developer/371324172) | [Ghumman Tech LLC](https://appshunter.io/developer/1671347750) |

## What reviewers say

### Interactive Solar System

[App page](https://appshunter.io/ios/app/interactive-solar-system/id1240878228)

**Features:** macOS Compatibility

**In-app purchases:** none


### Learn About Stars

[App page](https://appshunter.io/ios/app/learn-about-stars/id6446816058)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $9.99 | one-time |


## Frequently asked questions

### Is Interactive Solar System free?

Interactive Solar System costs $1.99, with no in-app purchases.

### Is Learn About Stars free?

Learn About Stars is free to download, with in-app purchases available.

### Do Interactive Solar System or Learn About Stars have ads?

Neither Interactive Solar System nor Learn About Stars shows ads.

### Which is updated more often, Interactive Solar System or Learn About Stars?

Interactive Solar System ships an update fortnightly, and Learn About Stars every 3 weeks. Most recently, Interactive Solar System was updated on October 26, 2026 and Learn About Stars 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.*