Comparison

SaturnMoons vs Planet Rotation

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

Head to head
About

SaturnMoons

Explore Saturn's rings and moons with this interactive guide. Pinpoint the location of its largest moons and step through time to see their future positions. Discover fascinating facts and images of Saturn's unique lunar family.

Highlights
  • Locate Saturn's nine largest moons
  • Pinch-zoomable interface
  • Local time synchronization
  • Time controls (seconds, hours, days, years)
  • Customizable telescope view
  • Encyclopedia of Saturn's moons
  • Stunning images of moons
Features
Read full description

Let SaturnMoons guide you to observing Saturn’s complex system of rings and moons. Sky & Telescope’s latest app helps you locate Saturn’s nine largest moons with a pinch-zoomable interface set to your local time, guiding you to Saturn’s largest moon, Titan, or helping you try your luck with the fainter moons. The time controls allow you to step through the seconds or hours, or speed through days or even years to see where the moons will be down the line. And you can flip the view to customize what you see through your telescope. Plus, our full encyclopedia section contains fascinating entries and stunning images of Saturn’s bizarre lunar family. Learn more about Saturn’s “death star” moon, Mimas, two-faced Iapetus, and the salty ocean frothing beneath Enceladus’s surface. Please note: this application is designed to work in landscape orientation only so that you may view Saturn, Saturn’s rings, and the lunar family at their best.

About

Planet Rotation

Features
Read full description

The screen at startup is the earth.The equatorial inclination angle of the earth is 23.4 degrees.Equatorial inclination angle is the angle between the equatorial plane and the orbital plane of a planet that revolves while rotating. The equatorial inclination angle of the mercury is 0.027 degrees.The rotation axis is upright almost vertically. The equatorial inclination angle of the venus is 177.36 degrees.The rotation axis is almost completely inverted, and it rotates in the opposite direction. The equatorial inclination angle of the mars is 25 degrees.The axis of rotation is a gradient close to the earth. You can change the rotation speed of the planet.The equatorial inclination angle of the jupiter is 3.08 degrees.The rotation axis is upright almost vertically. 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

SaturnMoons4 screens
Planet Rotation4 screens

Verdict

The call

The clearest difference is update cadence: Planet Rotation at every 10 months against SaturnMoons's every 26 months. Planet Rotation also leads on price ($0.99 vs $2.99). SaturnMoons's advantage is iOS requirement (8.0 vs 15.0). On ads, in-app purchases 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

SaturnMoons costs $2.99 and Planet Rotation $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

SaturnMoons ships an update every 26 months, Planet Rotation every 10 months. The most recent releases landed on October 29, 2026 and October 8, 2026 respectively.

Scorecard3 real differences · 7 level
SaturnMoons versus Planet Rotation: the parameters behind the verdict, then further details
ParameterSaturnMoonsPlanet Rotation
Price$2.99$0.99 — better
Rating5.0 (1 ratings) — better—
Positive reviews40.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 26 monthsEvery 10 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS8.0 — better15.0
Further details — not scored
Size36 MB41 MB
Age rating4+4+
DeveloperGuidebook IncMasahiro Tomosada

In-app purchases

None

SaturnMoons

No in-app purchases

None

Planet Rotation

No in-app purchases

Questions

Is SaturnMoons free?
SaturnMoons costs $2.99, with no in-app purchases.
Is Planet Rotation free?
Planet Rotation costs $0.99, with no in-app purchases.
Do SaturnMoons or Planet Rotation have ads?
Neither SaturnMoons nor Planet Rotation shows ads.
Which is updated more often, SaturnMoons or Planet Rotation?
SaturnMoons ships an update every 26 months, and Planet Rotation every 10 months. Most recently, SaturnMoons was updated on October 29, 2026 and Planet Rotation on October 8, 2026.

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