Comet Book is an education app developed by 株式会社ビクセン.
How many times has Comet Book been downloaded?
Comet Book has been downloaded 140 thousand times. In the last 30 days, the app was downloaded 120 times.
What is the rating of Comet Book?
Comet Book is rated 4.39 out of 5 stars, based on 480 ratings.
Is Comet Book free?
Comet Book is free to download. The APK download size is 2.82 MB. The latest version available is 2.7.10. The last update was on April 21, 2026.
What are the requirements for Comet Book?
Comet Book requires Android 5.0+ or higher. The app has a content rating of Everyone. The app has been available on Google Play September 2013.
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.
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★★★★★
ANTOINE AMAZING APP. AI CLOUD TECK. SIMPLIFY MAP. MORE UPDATES. THANKS TO DEVELOPERS. 🤣😎🤣✌🖖. 5 STARS MORE UPDATES.
★★★★★
Fanatics app! Really helpful for observing the Nowise comet! The 3D bird views are awesome, which illustrate the comets in the solar system!
★★★★★
Thanks for fixing the issue. Great app. I only wish this was working when Nowise was visible in my area.
★★★★★
Accurate positioning but... ... the autoscrolling is not too smooth. Not of a big deal, though. I was able to see Comet Love joy accurately because of this app.
★★☆☆☆
Website links under "Developer contact" in Google Play is broken. No reply to email link after 48 hours. Using the "Contact Us" in the app (buried at the bottom of the Support Page found from the Help menu) is tedious at best. Not worth the effort to use only to find that it doesn't work (confidence is not high that it will). The real problem is: the app is only showing two comets (neither of which are currently visible). And I cannot figure out how to add/update the comet information.
★★☆☆☆
Forces user into a horrible tutorial then looses the compass auto locate function upon closings the tutorial.
★★☆☆☆
The app closes as soon as I open it, have reinstalled it, restarted my mobile, but it closes on auto as soon as it opens
★★☆☆☆
Just got back from taking pictures of Nowise. If I listened to this app, I would have missed it completely. The app said it would fall below the horizon around 9:30 pm. Couldn't be more wrong. That didn't happen until almost 11 PM. No point in usuing an app that isn't accurate.
★★☆☆☆
Not good because free version I want private without egroger system
Google Play Rankings for Comet Book
This app is not ranked
Technologies used by Comet Book
Comet Book is requesting 6 permissions and is using 7 libraries.
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