Comet Book vs Bright Comets
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Comet viewing direction and elevation
- Real-time celestial object tracking
- 3D Solar System mode
- Visualize comet and planet motion
- Observing site guidance
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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.
Bright Comets
Discover visible comets in the night sky with this astronomy tool. Simply point your device upwards, and a red marker will guide you to the comet's location using real-time data.
- Locate visible comets
- Real-time sky pointing
- Red target marker guidance
- Uses device location
- NASA JPL ephemerides data
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This app helps you locate all bright comets currently visible in the night sky. Just hold your device up to the sky and find the red target marker on the screen. That's where the comet is! The app uses your location and up-to-date ephemerides from the NASA JPL's Horizons database to calculate the comet's position.
Screenshots
Verdict
The clearest difference is rating: Comet Book at 5.0 against Bright Comets's 4.3. Comet Book also leads on in-app purchases (none vs 1) and iOS requirement (12.0 vs 17.0). Bright Comets's advantage is update cadence (every 5 days vs every 6 months) and ratings volume (153 vs 2). On price, 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
Both are free to download. Bright Comets sells 1 one-off in-app purchase. Comet Book asks for nothing beyond the download.
Comet Book holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: Bright Comets has 153 ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 55% of Comet Book's written reviews are positive against 75% of Bright Comets's, so the app with the better star average is not the one people write more warmly about.
Comet Book ships an update every 6 months, Bright Comets every 5 days. The most recent releases landed on September 21, 2026 and September 20, 2026 respectively.
| Parameter | Comet Book | Bright Comets |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | 4.3 (153 ratings) |
| Positive reviews | 54.9% of reviews | 74.7% of reviews — better |
| Number of ratings | 2 | 153 — better |
| Update frequency | Every 6 months | Every 5 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 12.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 10 MB | 23 MB |
| Age rating | 9+ | 4+ |
| Developer | Vixen Co.,Ltd. | Hanno Rein |
Customer experience
Comet Book
Bright Comets
In-app purchases
Comet Book
No in-app purchases
Bright Comets
- Coffee$1.99
Questions
Is Comet Book free?
Is Bright Comets free?
Which has better reviews, Comet Book or Bright Comets?
Do Comet Book or Bright Comets have ads?
Which is updated more often, Comet Book or Bright Comets?
Other comparisons
