Comparison

SkyORB Classic Astronomy vs Comet Book

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

Head to head
About

SkyORB Classic Astronomy

Explore the cosmos with a 3D planetarium and real-time celestial event tracking. Identify stars and planets using your device's sensors and AR, and receive notifications for upcoming astronomical phenomena. Access detailed information and simulations from any location.

Highlights
  • 3D star map and planetarium
  • Real-time planet orbits
  • AR night sky identification
  • Celestial event notifications
  • Universal search for celestial objects
  • Moon phase tracking
  • Worldwide sky simulations
Features
Read full description

Unleash the power of the universe with SkyORB, your all-in-one astronomy companion. Explore the stars, planets, and celestial events like never before. Discover the wonders of the cosmos and stay informed about astronomical phenomena. Why Choose SkyORB? Astronomy at Your Fingertips: SkyORB is a lightweight and fast astronomy app designed to put the universe in the palm of your hand. With a 3D star map, a feature-packed planetarium, ephemeris with notifications, and much more, it's your gateway to the cosmos. Real-Time 3D Universe: Immerse yourself in a breathtaking 3D representation of our solar system. Watch as planets orbit the sun in real-time. Zoom in for a closer look at the planets or zoom out to explore the entire Milky Way. Explore the Night Sky: SkyORB brings the night sky to life. Use your device to point at a star or planet, and our app will identify it for you. Whether you rely on GPS positioning, compass orientation, gyroscope data, or ARKit, we've got you covered. Stay Informed: Keep track of comets and satellites with updates from the web. Stay on top of celestial events with personalized ephemeris that covers the next 60 days. Whether it's the peak of a meteor shower or a planetary elongation, we'll make sure you're in the know. Universal Search: Looking for a specific celestial object? Our universal search engine lets you find everything from constellations and planets to space probes and more with just a few keystrokes. Moon Phases: SkyORB provides moon phase information, including rise and set times. Explore the moon's changing faces and understand its impact on the night sky. Worldwide Simulations: Simulate the night sky from any location on Earth or even from other planets like Mars. SkyORB Classic lets you explore the universe from wherever you are. Notifications: Receive local notifications for significant astronomical events like planet visibility, full and new moons, and eclipses. Plus, get the latest astronomy news delivered right to your device. Upgrade to SkyORB Premium and Unlock Even More: Ad-Free Experience: Say goodbye to ads and enjoy uninterrupted stargazing. Enhanced Planetarium: Go full-screen in planetarium mode, unlocking more views. Extended Information: Get more details on moon phases and ephemeris. Comprehensive Search: Unlock the full potential of our search engine. Multi-Device Access: Access your premium features on all your devices connected to your account with iOS cloud storage. And Much More: Enjoy a host of additional premium features. Apple Watch Support: Now you can explore the cosmos right from your wrist with vocal search, digital crown functionality, an equation of time complication, and standalone use. Upgrade and Renewal: The 12-month Premium Membership automatically renews, ensuring uninterrupted access to premium features. Manage your subscription in your iTunes account settings. Step into the world of astronomy with SkyORB. Download it today and embark on your cosmic journey. The universe is waiting

About

Comet Book

Discover and track comets with this educational app. It provides real-time direction and elevation data to help you locate celestial objects in the night sky. Explore the solar system in 3D and visualize the movement of comets and planets.

Highlights
  • Comet viewing direction and elevation
  • Real-time celestial object tracking
  • 3D Solar System mode
  • Visualize comet and planet motion
  • Observing site guidance
Read full description

The Comet Book app clearly shows when Comets can be viewed and in which direction. The direction and elevation of a Comet can change noticeably in a day due to its fast apparent motion. The moon and a bright planet may be convenient as a guide to find the comet though they have large apparent motion, too. This app determines where Comet is in the sky when it becomes visible at your observing site. You can easily start your observation of a Comet by using Comet Book as a guide to the direction and elevation of the comet. In addition, the new “3D Solar System seen from Space” mode allows you to view the motion of Comets and planets turning around the sun. Please take a look the comet’s movement around our solar system.

Screenshots

SkyORB Classic Astronomy4 screens
Comet Book2 screens

Verdict

The call

The clearest difference is rating: Comet Book at 5.0 against SkyORB Classic Astronomy's 4.5. Comet Book also leads on in-app purchases (none vs 2) and ads (none vs shown). SkyORB Classic Astronomy's advantage is update cadence (every 2 months vs every 6 months) and ratings volume (24 vs 3). On price, review sentiment 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

Both are free to download. SkyORB Classic Astronomy sells 2 in-app purchases, starting at $1.99 per year. Comet Book asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Comet Book holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: SkyORB Classic Astronomy has 24 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 54% of SkyORB Classic Astronomy's written reviews are positive against 55% of Comet Book's.

UpkeepUpdate frequency

SkyORB Classic Astronomy ships an update every 2 months, Comet Book every 6 months. Both last shipped on October 23, 2026.

Scorecard7 real differences · 3 level
SkyORB Classic Astronomy versus Comet Book: the parameters behind the verdict, then further details
ParameterSkyORB Classic AstronomyComet Book
PriceFreeFree
Rating4.5 (24 ratings)5.0 (3 ratings) — better
Positive reviews53.8% of reviews54.9% of reviews — better
Number of ratings24 — better3
Update frequencyEvery 2 months — betterEvery 6 months
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFreemiumFree — better
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone, iPad, iPod
Requires iOS15.612.0 — better
Further details — not scored
Size143 MB10 MB
Age rating4+9+
DeveloperStephane DenisVixen Co.,Ltd.

Customer experience

SkyORB Classic Astronomy

All ratings24 ratings
Positive91.7%
Neutral0.0%
Negative8.3%
Written reviews299 reviews
Positive53.8%
Neutral15.4%
Negative30.8%

Comet Book

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews51 reviews
Positive54.9%
Neutral17.6%
Negative27.5%

Bugs and requests

SkyORB Classic Astronomy

Reported bugs

4 issues
  • Compass and orientation issues
  • Inconsistent behavior across devices
  • Incorrect or outdated celestial data
  • Persistent login and subscription problems

Requested features

4 requests
  • More detailed instructions and tutorials
  • Improved search and navigation
  • Ability to track comets and asteroids
  • Seamless integration with telescopes

Comet Book

Not enough reviews yet to summarise bugs or requests.

In-app purchases

2 purchases

SkyORB Classic Astronomy

Subscriptions1
  • 1-year Premium Subscription$1.991 Year
One-time1
  • Premium Version$3.99
None

Comet Book

No in-app purchases

Questions

Is SkyORB Classic Astronomy free?
SkyORB Classic Astronomy is free to download, with in-app purchases available.
Is Comet Book free?
Comet Book is free to download, with no in-app purchases.
Which has better reviews, SkyORB Classic Astronomy or Comet Book?
Comet Book is rated higher. SkyORB Classic Astronomy averages 4.5 out of 5 from 24 ratings, while Comet Book averages 5.0 from 3 ratings.
Do SkyORB Classic Astronomy or Comet Book have ads?
SkyORB Classic Astronomy shows ads; Comet Book does not.
Which is updated more often, SkyORB Classic Astronomy or Comet Book?
SkyORB Classic Astronomy ships an update every 2 months, and Comet Book every 6 months. Most recently, SkyORB Classic Astronomy was updated on October 23, 2026 and Comet Book on October 23, 2026.

Other comparisons