# The Earth Clock vs 惑星AR

The clearest difference is update cadence: 惑星AR at every 7 months against The Earth Clock's every 24 months. The Earth Clock's advantage is iOS requirement (8.1 vs 12.0). On price, ads, in-app purchases and device support there is nothing between them.

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

The Earth Clock ships an update every 24 months, 惑星AR every 7 months. The most recent releases landed on September 9, 2026 and June 3, 2026 respectively.

## The numbers

| Metric | The Earth Clock | 惑星AR |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 24 months | **Every 7 months** |
| Monetization | — | Free |
| Size | 27 MB | 81 MB |
| Requires iOS | **8.1** | 12.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [masafumi sasaki](https://appshunter.io/developer/1016775706) | [Thunderbird, Inc.](https://appshunter.io/developer/1066532988) |

## What reviewers say

### The Earth Clock

[App page](https://appshunter.io/ios/app/the-earth-clock/id1242158779)

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

**In-app purchases:** none


### 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


## Frequently asked questions

### Is The Earth Clock free?

The Earth Clock is free to download, with no in-app purchases.

### Is 惑星AR free?

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

### Do The Earth Clock or 惑星AR have ads?

Neither The Earth Clock nor 惑星AR shows ads.

### Which is updated more often, The Earth Clock or 惑星AR?

The Earth Clock ships an update every 24 months, and 惑星AR every 7 months. Most recently, The Earth Clock was updated on September 9, 2026 and 惑星AR on June 3, 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.*