Comparison

Solar System Clock vs RGB Colour Tool

Price, ratings, monetisation and update history for both apps, side by side β€” with what reviewers say about each.

Head to head
About

Solar System Clock

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
Read full description

No AI was used in the making of this app, including code and visual assets. The app comes with the Earth and Mars clocks free of charge (including associated moons), and additional planet clocks can be purchased through the app or the App Store. The purchase also includes the new customisable widgets and the current and past positions of supported objects. Did you ever want to know the time on Saturn? The simple Solar System Clock can tell the time on any planet or dwarf planet, and the Sun in relation to Earth time. Calculated from the starting date of the Gregorian calendar, the app displays seconds, minutes, hours, days and years for each object based on orbit and rotation data. The time is given in both analog and digital formats and can be stopped and restarted for easy viewing, while keeping to the accurate localised time. A single analog clock face for all planets and dwarf planets is also included, and can be split into two clocks for main planets and dwarf planets.Β Times can be freely translated between planets, the Sun and moons. The app also provides the current and past positions of the planets, moons and dwarf planets to scale in the form of an interactive map, and the seasons on every planet and dwarf planet. A widget form of the Earth and Mars clocks is provided for circular widget slots on Apple Watch, and widgets on other supported devices can be customised within the app. An iMessage extension is also included to enable easy communication using the time systems. The main clock can also be projected as functional wall art.

About

RGB Colour Tool

Features
Read full description

RGB Colour Tool is a dynamic app which lets you play with values for red, green, and blue to generate a colour for your reference which can be copied as either a hex value or RGB value.

Screenshots

Solar System Clock4 screens
RGB Colour Tool4 screens

Verdict

The call

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.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

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

UpkeepUpdate frequency

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.

Scorecard3 real differences Β· 5 level
Solar System Clock versus RGB Colour Tool: the parameters behind the verdict, then further details
ParameterSolar System ClockRGB Colour Tool
PriceFreeFree
Positive reviews100.0% of reviewsβ€”
Update frequencyEvery 6 weeks β€” betterEvery 7 months
AdsNoNo
In-app purchasesYesNo β€” better
MonetizationFree with in-app purchasesβ€”
DevicesiPhone, iPad, Apple WatchiPhone, iPad, iPod
Requires iOS18.013 β€” better
Further details β€” not scored
Size26 MB20 MB
Age rating4+4+
DeveloperSunita GeorgeSAMUEL R HARVEY

In-app purchases

1 purchases

Solar System Clock

One-time1
  • All Planets and Dwarf Planets$2.99
None

RGB Colour Tool

No in-app purchases

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.

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