# Project Planet Space vs Orrery

The clearest difference is in-app purchases: Project Planet Space at none against Orrery's 1. Project Planet Space also leads on rating (5.0 vs 4.7) and iOS requirement (15.0 vs 17.0). Orrery's advantage is update cadence (every 5 days vs every 25 months) and ratings volume (26 vs 1). On price, ads and device support there is nothing between them.

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

Project Planet Space holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Orrery has 26 ratings behind it against 1, so its average is the more settled of the two.

Project Planet Space ships an update every 25 months, Orrery every 5 days. The most recent releases landed on November 4, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | Project Planet Space | Orrery |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/project-planet-space/id6499347273/reviews)** | [4.7 (26 ratings)](https://appshunter.io/ios/app/orrery-a-solar-system/id6788141567/reviews) |
| Number of ratings | 1 | **26** |
| Positive reviews | — | 66.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 25 months | **Every 5 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 2 MB | 62 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Miroslav Hanzelka](https://appshunter.io/developer/1653768748) | [Thu Van Ngo](https://appshunter.io/developer/6782177457) |

## What reviewers say

### 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


### Orrery

[App page](https://appshunter.io/ios/app/orrery-a-solar-system/id6788141567)

Explore a dynamic 3D model of the solar system with interactive globes, narrated stories, and historical timelines. Learn about planets, celestial events, and space exploration through engaging lessons and quizzes. Features augmented reality and home screen widgets for a constant connection to the cosmos.

**Highlights:** Interactive 3D solar system model, Planet data and narrated stories, Historical and future timelines, Augmented reality (AR) mode, Educational mini-lessons and quizzes, Home screen widgets, Multi-language support

**Features:** Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| The Whole Solar System | $6.99 | one-time |


## Frequently asked questions

### Is Project Planet Space free?

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

### Is Orrery free?

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

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

Project Planet Space is rated higher. Project Planet Space averages 5.0 out of 5 from 1 ratings, while Orrery averages 4.7 from 26 ratings.

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

Neither Project Planet Space nor Orrery shows ads.

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

Project Planet Space ships an update every 25 months, and Orrery every 5 days. Most recently, Project Planet Space was updated on November 4, 2026 and Orrery on November 10, 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.*