# The Solar System vs Alien Planets

The clearest difference is price: The Solar System at $1.99 against Alien Planets's $9.99. The Solar System also leads on iOS requirement (12.0 vs 27.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

The Solar System costs $1.99 and Alien Planets $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

The Solar System ships an update every 29 months, Alien Planets every 24 months. The most recent releases landed on October 14, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | The Solar System | Alien Planets |
| --- | --- | --- |
| Price | **$1.99** | $9.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 29 months | **Every 24 months** |
| Size | 112 MB | 51 MB |
| Requires iOS | **12.0** | 27.0 |
| Devices | iPad | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Ventura Educational Systems](https://appshunter.io/developer/371324172) | [Jose Leal](https://appshunter.io/developer/1441468562) |

## What reviewers say

### The Solar System

[App page](https://appshunter.io/ios/app/the-solar-system-ar/id1322087991)

**Features:** macOS Compatibility

**In-app purchases:** none


### Alien Planets

[App page](https://appshunter.io/ios/app/alien-planets/id1478121868)

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

**In-app purchases:** none


## Frequently asked questions

### Is The Solar System free?

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

### Is Alien Planets free?

Alien Planets costs $9.99, with no in-app purchases.

### Do The Solar System or Alien Planets have ads?

Neither The Solar System nor Alien Planets shows ads.

### Which is updated more often, The Solar System or Alien Planets?

The Solar System ships an update every 29 months, and Alien Planets every 24 months. Most recently, The Solar System was updated on October 14, 2026 and Alien Planets on October 19, 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.*