# 惑星AR vs Optical Path

The clearest difference is price: 惑星AR at Free against Optical Path's $1.99. 惑星AR also leads on iOS requirement (12.0 vs 15.6). On update cadence, ads, in-app purchases and device support there is nothing between them.

惑星AR is free to download; Optical Path costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

惑星AR ships an update every 7 months, Optical Path every 12 months. The most recent releases landed on June 3, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | 惑星AR | Optical Path |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 7 months** | Every 12 months |
| Monetization | Free | — |
| Size | 81 MB | 6 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Thunderbird, Inc.](https://appshunter.io/developer/1066532988) | [坤 冉](https://appshunter.io/developer/1759927074) |

## 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


### Optical Path

[App page](https://appshunter.io/ios/app/optical-path/id6670541141)

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

**In-app purchases:** none


## Frequently asked questions

### Is 惑星AR free?

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

### Is Optical Path free?

Optical Path costs $1.99, with no in-app purchases.

### Do 惑星AR or Optical Path have ads?

Neither 惑星AR nor Optical Path shows ads.

### Which is updated more often, 惑星AR or Optical Path?

惑星AR ships an update every 7 months, and Optical Path every 12 months. Most recently, 惑星AR was updated on June 3, 2026 and Optical Path on September 16, 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.*