SaturnMoons vs CosmoTime
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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.
CosmoTime
Explore the universe with this astronomy companion app. It simplifies complex space concepts through interactive visuals, daily insights, and gamified learning. Track your progress and discover major space missions and scientific breakthroughs.
- Explore planets and galaxies
- Learn 70+ astronomy concepts
- Daily personalized space content
- Gamified learning with quizzes
- Timeline of space discoveries
- Dark-themed interface
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Explore the universe like never before. CosmoTime is your all-in-one astronomy companion, designed to turn complex space concepts into a beautiful and interactive experience. Whether you're a curious beginner or a passionate stargazer, CosmoTime helps you understand the cosmos in a simple, engaging way. Discover the Universe Explore planets, galaxies, and deep-space phenomena through a curated digital experience with rich visuals and fascinating insights. Learn with Simplicity Understand over 70+ astronomy and physics concepts—from gravity to black holes—explained in clear and approachable language. Daily Cosmic Insights Start your day with personalized space content and discover what’s happening in the sky above your location. Gamified Learning Take quizzes, earn points, and track your progress as you grow your knowledge of the universe. Timeline of Discoveries Travel through major space missions and scientific breakthroughs that shaped our understanding of space. Designed for Space Lovers A modern dark-themed interface with smooth animations inspired by the beauty of the cosmos. Why CosmoTime? Most apps show you space. CosmoTime helps you understand it. Start your journey today.
Screenshots
Verdict
SaturnMoons and CosmoTime both sit at 5.0 stars, but that hides the real split: 100% of CosmoTime's written reviews are positive against 40% of SaturnMoons's. CosmoTime also leads on price (Free vs $2.99) and update cadence (every 3 months vs every 26 months). SaturnMoons's advantage is device support (3 vs 1) and iOS requirement (8.0 vs 18.6). On rating, ratings volume, ads and in-app purchases 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
CosmoTime is free to download; SaturnMoons costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 5.0 for SaturnMoons against 5.0 for CosmoTime. Both are backed by a comparable volume of ratings — 1 and 1 respectively. Written reviews are what separate them: 40% of SaturnMoons's written reviews are positive against 100% of CosmoTime's.
SaturnMoons ships an update every 26 months, CosmoTime every 3 months. The most recent releases landed on November 6, 2026 and November 5, 2026 respectively.
| Parameter | SaturnMoons | CosmoTime |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 5.0 (1 ratings) | 5.0 (1 ratings) |
| Positive reviews | 40.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 1 | 1 |
| Update frequency | Every 26 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 8.0 — better | 18.6 |
| Further details — not scored | ||
| Size | 36 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Guidebook Inc | pezhman mohammadzadehkordestani |
Customer experience
SaturnMoons
CosmoTime
In-app purchases
SaturnMoons
No in-app purchases
CosmoTime
No in-app purchases
