Solar System Viewer vs Solar System Clock
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Solar System Viewer
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.
- Simulate planetary orbits
- Adjust time speed
- Time travel to specific dates
- Home screen widgets
- Apple Watch integration
- View planet overviews
Read full descriptionHide full description
8Planets is a simple viewer and simulator for planetary orbits in our Solar System. 8Planets helps you discover how the planets aligned and move around over time so that you feel the scale of the Solar System or even the Universe. By giving you quick and easy access to the Solar System everywhere, 8Planets will make you feel that the Solar System is close to us. FEATURES ・Planetary Motion Speed up or slow down time to see how the planets rotate over time and grasp the scale of the Solar System. ・Time Travel Travel back or forward in time to view the Solar System or planetary positions on any given date. ・Widgets Widgets allow you to display the real-time Solar System on your Home Screen. ・Watch View the Solar System on your wrist and use Digital Crown to travel back or forward in time. ・Others Apple Watch Complications, Overview of the planets, Option to show Pluto, Sharing your favorite moment of the Solar System, URL Scheme, and more.
Solar System Clock
Visualize the current or historical positions of planets in our solar system. Explore future or past planetary alignments and identify optimal times for observing planets in the night sky.
- Real-time planet positions
- Custom date selection
- Past and future alignments
- Optimal viewing time identification
- Solar System visualization
Read full descriptionHide full description
See the positions of all planets in our Solar System based on the current date. Or, you can set your own custom date to see the alignment of our planets from a future date or a past date. You can use this app to find out the best time to watch a planet in the sky by finding out when it will be closest to Earth.
Screenshots
Verdict
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). Solar System Viewer's advantage is rating (4.4 vs 3.0) and ratings volume (28 vs 1). On ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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 holds the better App Store score, 4.4 against 3.0. That said, the two scores are not equally well evidenced: Solar System Viewer has 28 ratings behind it against 1, so its average is the more settled of the two.
Solar System Viewer ships an update every 2 months, Solar System Clock every 2 days. The most recent releases landed on November 7, 2026 and October 30, 2026 respectively.
| Parameter | Solar System Viewer | Solar System Clock |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 4.4 (28 ratings) — better | 3.0 (1 ratings) |
| Positive reviews | 83.3% of reviews | — |
| Number of ratings | 28 — better | 1 |
| Update frequency | Every 2 months | Every 2 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, Mac, Apple Watch — better | iPhone, iPad, Apple Watch |
| Requires iOS | 26.0 | 16.6 — better |
| Further details — not scored | ||
| Size | 22 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | BLUE COMET LABS LLC | Mateusz Andrzejczuk |
In-app purchases
Solar System Viewer
- Io Tip$1.99
- Europa Tip$3.99
- Ganymede Tip$5.99
Show 1 moreShow fewer
- Callisto Tip$9.99
Solar System Clock
No in-app purchases
Questions
Is Solar System Viewer free?
Is Solar System Clock free?
Which has better reviews, Solar System Viewer or Solar System Clock?
Do Solar System Viewer or Solar System Clock have ads?
Which is updated more often, Solar System Viewer or Solar System Clock?
Other comparisons
