# Solar System Clock vs RGB Colour Tool

The clearest difference is in-app purchases: RGB Colour Tool at none against Solar System Clock's 1. RGB Colour Tool also leads on iOS requirement (13 vs 18.0). Solar System Clock's advantage is update cadence (every 6 weeks vs every 7 months). On price, ads and device support there is nothing between them.

Both are free to download. Solar System Clock sells 1 one-off in-app purchase. RGB Colour Tool asks for nothing beyond the download.

Solar System Clock ships an update every 6 weeks, RGB Colour Tool every 7 months. The most recent releases landed on October 15, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Solar System Clock | RGB Colour Tool |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 7 months |
| Monetization | Free with in-app purchases | — |
| Size | 26 MB | 20 MB |
| Requires iOS | 18.0 | **13** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Sunita George](https://appshunter.io/developer/1777332550) | [SAMUEL R HARVEY](https://appshunter.io/developer/1737755904) |

## What reviewers say

### Solar System Clock

[App page](https://appshunter.io/ios/app/solar-system-clock/id6737652569)

Explore the time and positions of celestial bodies across our solar system. View analog and digital clocks for planets, dwarf planets, and moons, with interactive maps and customizable widgets. Understand planetary seasons and translate times between objects.

**Highlights:** Planet and moon time displays, Analog and digital clock formats, Interactive solar system map, Customizable widgets, Planetary season information, Time translation between celestial bodies

**Features:** macOS Compatibility, Apple Watch app, iMessage stickers, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| All Planets and Dwarf Planets | $2.99 | one-time |


### RGB Colour Tool

[App page](https://appshunter.io/ios/app/rgb-colour-tool/id6742676407)

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

**In-app purchases:** none


## Frequently asked questions

### Is Solar System Clock free?

Solar System Clock is free to download, with in-app purchases available.

### Is RGB Colour Tool free?

RGB Colour Tool is free to download, with no in-app purchases.

### Do Solar System Clock or RGB Colour Tool have ads?

Neither Solar System Clock nor RGB Colour Tool shows ads.

### Which is updated more often, Solar System Clock or RGB Colour Tool?

Solar System Clock ships an update every 6 weeks, and RGB Colour Tool every 7 months. Most recently, Solar System Clock was updated on October 15, 2026 and RGB Colour Tool on October 7, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*