# Planet vs COSMOS

The clearest difference is iOS requirement: COSMOS at 15.0 against Planet's 17.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Planet ships an update weekly, COSMOS every 2 weeks. The most recent releases landed on October 20, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Planet | COSMOS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/cosmos-3d-solar-system/id6792780408/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 2 weeks |
| Monetization | — | Paid |
| Size | 25 MB | 4 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 9+ | 4+ |
| Developer | [Ahmad khaled Samim](https://appshunter.io/developer/6780888534) | [yuudai tasaki](https://appshunter.io/developer/1861229093) |

## What reviewers say

### Planet

[App page](https://appshunter.io/ios/app/planet-solar-system/id6790789495)

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

**In-app purchases:** none


### COSMOS

[App page](https://appshunter.io/ios/app/cosmos-3d-solar-system/id6792780408)

Explore a real-time 3D model of the solar system, accurately depicting planet positions based on orbital mechanics. Zoom in on celestial bodies, control time to view past or future sky events, and learn details about each planet. This app offers an ad-free, offline experience with a one-time purchase.

**Highlights:** Real-time planet and moon positions, Scrub through time for past/future views, Photo-realistic textures, Adjustable time scale, Free exploration with pinch and swipe, Detailed information on celestial bodies

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

**In-app purchases:** none


## Frequently asked questions

### Is Planet free?

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

### Is COSMOS free?

COSMOS is free to download, with no in-app purchases.

### Do Planet or COSMOS have ads?

Neither Planet nor COSMOS shows ads.

### Which is updated more often, Planet or COSMOS?

Planet ships an update weekly, and COSMOS every 2 weeks. Most recently, Planet was updated on October 20, 2026 and COSMOS on October 25, 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.*