Comparison

Solar System Viewer vs Satellite Rotation

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

Head to head
About

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.

Highlights
  • Simulate planetary orbits
  • Adjust time speed
  • Time travel to specific dates
  • Home screen widgets
  • Apple Watch integration
  • View planet overviews
Features
Read 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.

About

Satellite Rotation

Features
Read full description

These are 3D animations of the top 10 largest satellites in the solar system. 1.Ganymede : Satellite of Jupiter radius : 2,632km (1.52 times the moon) 2.Titan : Satellite of Saturn radius : 2,575km (1.48 times the moon) 3.Callisto : Satellite of Jupiter radius : 2,409km (1.39 times the moon) 4.Io : Satellite of Jupiter radius : 1,821km (1.05 times the moon) 5.Moon : Satellite of Earth radius : 1,737km 6.Europa : Satellite of Jupiter radius : 1,562km (0.9 times the moon) 7.Triton : Satellite of Neptune radius : 1,353km (0.78 times the moon) 8.Titania : Satellite of Uranus radius : 789km (0.45 times the moon) 9.Rhea : Satellite of Saturn radius : 764km (0.44 times the moon) 10.Oberon : Satellite of Uranus radius : 761km (0.44 times the moon) ・You can change the rotation speed of the satellite. ・When you press the button, the angle of the sun changes by 30 degrees each time. ・The fastest thing is one revolution per second.The slowest thing is one rotation in 300 seconds (5 minutes). ・When checked, reverse rotation will occur.

Screenshots

Solar System Viewer3 screens
Satellite Rotation4 screens

Verdict

The call

The clearest difference is in-app purchases: Satellite Rotation at none against Solar System Viewer's 4. Satellite Rotation also leads on price ($0.99 vs $2.99) and iOS requirement (11.0 vs 26.0). Solar System Viewer's advantage is update cadence (every 2 months vs every 7 months). 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

CostPrice · In-app purchases · Ads · Monetization

Solar System Viewer costs $2.99 and Satellite Rotation $0.99 up front. Solar System Viewer sells 4 one-off in-app purchases. Satellite Rotation asks for nothing beyond the download.

UpkeepUpdate frequency

Solar System Viewer ships an update every 2 months, Satellite Rotation every 7 months. The most recent releases landed on October 29, 2026 and October 25, 2026 respectively.

Scorecard4 real differences · 6 level
Solar System Viewer versus Satellite Rotation: the parameters behind the verdict, then further details
ParameterSolar System ViewerSatellite Rotation
Price$2.99$0.99 — better
Rating4.4 (28 ratings) — better—
Positive reviews83.3% of reviews—
Number of ratings28 — better—
Update frequencyEvery 2 months — betterEvery 7 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationPaid—
DevicesiPhone, iPad, Mac, Apple Watch — betteriPhone, iPad, iPod
Requires iOS26.011.0 — better
Further details — not scored
Size22 MB31 MB
Age rating4+17+
DeveloperBLUE COMET LABS LLCMasahiro Tomosada

In-app purchases

4 purchases

Solar System Viewer

One-time4
  • Io Tip$1.99
  • Europa Tip$3.99
  • Ganymede Tip$5.99
Show 1 more
  • Callisto Tip$9.99
None

Satellite Rotation

No in-app purchases

Questions

Is Solar System Viewer free?
Solar System Viewer costs $2.99, and also offers in-app purchases.
Is Satellite Rotation free?
Satellite Rotation costs $0.99, with no in-app purchases.
Do Solar System Viewer or Satellite Rotation have ads?
Neither Solar System Viewer nor Satellite Rotation shows ads.
Which is updated more often, Solar System Viewer or Satellite Rotation?
Solar System Viewer ships an update every 2 months, and Satellite Rotation every 7 months. Most recently, Solar System Viewer was updated on October 29, 2026 and Satellite Rotation on October 25, 2026.

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