# Saturn vs Project Planet Space

The clearest difference is in-app purchases: Project Planet Space at none against Saturn's 1. Project Planet Space also leads on ads (none vs shown) and iOS requirement (15.0 vs 17.0). Saturn's advantage is update cadence (every 10 months vs every 25 months). On price, rating, ratings volume and device support there is nothing between them.

Both are free to download. Saturn sells 1 one-off in-app purchase. Project Planet Space asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Saturn against 5.0 for Project Planet Space. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Saturn ships an update every 10 months, Project Planet Space every 25 months. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Saturn | Project Planet Space |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/saturn-cassini/id1567740684/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/project-planet-space/id6499347273/reviews) |
| Number of ratings | 1 | 1 |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 10 months** | Every 25 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 74 MB | 2 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 9+ | 4+ |
| Developer | [Alparslan Topbas](https://appshunter.io/developer/1130875171) | [Miroslav Hanzelka](https://appshunter.io/developer/1653768748) |

## What reviewers say

### Saturn

[App page](https://appshunter.io/ios/app/saturn-cassini/id1567740684)

Explore stunning high-definition images and videos of Saturn and its moons. This app offers interactive 3D models and detailed insights into the Cassini mission. Perfect for space enthusiasts and students.

**Highlights:** Browse hundreds of stunning photos with detailed insights, Cinematic slideshow for an immersive orbiting experience, Interactive gallery with high-resolution zoom, Watch historic Cassini-Huygens mission videos, Explore interactive 3D models of the Saturn system, Modern glassmorphism UI with dark mode

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


### Project Planet Space

[App page](https://appshunter.io/ios/app/project-planet-space/id6499347273)

Explore our solar system with an interactive map. Discover planetary gravity, temperatures, and atmospheric data. Calculate your weight on other worlds and learn fascinating space facts.

**Highlights:** Interactive solar system map, Personalized weight and age calculations, Detailed planetary data widgets, Multi-language support, Metric/Imperial unit switching, Cosmic museum aesthetic, Real astronomical data integration

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Saturn free?

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

### Is Project Planet Space free?

Project Planet Space is free to download, with no in-app purchases.

### Which has better reviews, Saturn or Project Planet Space?

Saturn and Project Planet Space are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do Saturn or Project Planet Space have ads?

Saturn shows ads; Project Planet Space does not.

### Which is updated more often, Saturn or Project Planet Space?

Saturn ships an update every 10 months, and Project Planet Space every 25 months. Most recently, Saturn was updated on November 3, 2026 and Project Planet Space on November 4, 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.*