# Solar System Viewer vs Solar System Clock

The clearest difference is price: Solar System Clock at Free against Solar System Viewer's $2.99. Solar System Clock also leads on in-app purchases (none vs 4) and update cadence (every 2 days vs every 2 months). On ads and device support there is nothing between them.

Solar System Clock is free to download; Solar System Viewer costs $2.99 up front. Solar System Viewer sells 4 one-off in-app purchases. Solar System Clock asks for nothing beyond the download.

Solar System Viewer ships an update every 2 months, Solar System Clock every 2 days. The most recent releases landed on October 18, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Solar System Viewer | Solar System Clock |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[4.4 (28 ratings)](https://appshunter.io/ios/app/solar-system-viewer-8planets/id1554639445/reviews)** | — |
| Number of ratings | **28** | — |
| Positive reviews | 83.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 days** |
| Monetization | Paid | — |
| Size | 22 MB | 5 MB |
| Requires iOS | 26.0 | **16.6** |
| Devices | **iPhone, iPad, Mac, Apple Watch** | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [BLUE COMET LABS LLC](https://appshunter.io/developer/1492055170) | [Mateusz Andrzejczuk](https://appshunter.io/developer/1158375886) |

## What reviewers say

### Solar System Viewer

[App page](https://appshunter.io/ios/app/solar-system-viewer-8planets/id1554639445)

Explore and simulate the orbits of planets in our solar system. This app allows you to speed up or slow down time, travel to any date, and view planetary positions. It also offers widgets for your home screen and Apple Watch complications.

**Highlights:** Simulate planetary orbits, Adjust time speed, Time travel to specific dates, Home screen widgets, Apple Watch integration, View planet overviews

**Features:** Apple Watch app, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Io Tip | $1.99 | one-time |
| Europa Tip | $3.99 | one-time |
| Ganymede Tip | $5.99 | one-time |
| Callisto Tip | $9.99 | one-time |


### Solar System Clock

[App page](https://appshunter.io/ios/app/solar-system-clock/id6746730661)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Solar System Viewer free?

Solar System Viewer costs $2.99, and also offers in-app purchases.

### Is Solar System Clock free?

Solar System Clock is free to download, with no in-app purchases.

### Do Solar System Viewer or Solar System Clock have ads?

Neither Solar System Viewer nor Solar System Clock shows ads.

### Which is updated more often, Solar System Viewer or Solar System Clock?

Solar System Viewer ships an update every 2 months, and Solar System Clock every 2 days. Most recently, Solar System Viewer was updated on October 18, 2026 and Solar System Clock on October 9, 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.*