# 惑星AR vs CosmicObserver

The clearest difference is in-app purchases: 惑星AR at none against CosmicObserver's 1. 惑星AR also leads on device support (3 vs 1) and iOS requirement (12.0 vs 18.0). CosmicObserver's advantage is update cadence (every 3 weeks vs every 7 months). On price and ads there is nothing between them.

Both are free to download. CosmicObserver sells 1 one-off in-app purchase. 惑星AR asks for nothing beyond the download.

惑星AR ships an update every 7 months, CosmicObserver every 3 weeks. The most recent releases landed on October 1, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | 惑星AR | CosmicObserver |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 81 MB | 226 MB |
| Requires iOS | **12.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Thunderbird, Inc.](https://appshunter.io/developer/1066532988) | [Yuichi Okuno](https://appshunter.io/developer/1803911141) |

## What reviewers say

### 惑星AR

[App page](https://appshunter.io/ios/app/ar/id1575645390)

Explore the solar system with interactive visualizations. Understand planetary sizes and distances through intuitive modes, and learn fascinating facts with quizzes. Ideal for grasping astronomical concepts visually.

**Highlights:** Size comparison mode, Distance comparison mode, Orbit visualization, Interactive 3D manipulation, Detailed planet information, Quiz-based trivia

**Features:** macOS Compatibility

**In-app purchases:** none


### CosmicObserver

[App page](https://appshunter.io/ios/app/cosmicobserver/id6787430312)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cosmic Pass | $4.99 | one-time |


## Frequently asked questions

### Is 惑星AR free?

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

### Is CosmicObserver free?

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

### Do 惑星AR or CosmicObserver have ads?

Neither 惑星AR nor CosmicObserver shows ads.

### Which is updated more often, 惑星AR or CosmicObserver?

惑星AR ships an update every 7 months, and CosmicObserver every 3 weeks. Most recently, 惑星AR was updated on October 1, 2026 and CosmicObserver on September 30, 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.*