# Comet Book vs Bright Comets

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.

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.

## The numbers

| Metric | Comet Book | Bright Comets |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/comet-book/id604782335/reviews)** | [4.3 (153 ratings)](https://appshunter.io/ios/app/bright-comets/id1523594527/reviews) |
| Number of ratings | 2 | **153** |
| Positive reviews | 54.9% of reviews | **74.7% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 5 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 10 MB | 23 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 9+ | 4+ |
| Developer | [Vixen Co.,Ltd.](https://appshunter.io/developer/536188843) | [Hanno Rein](https://appshunter.io/developer/325840976) |

## What reviewers say

### Comet Book

[App page](https://appshunter.io/ios/app/comet-book/id604782335)

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

**In-app purchases:** none


### Bright Comets

[App page](https://appshunter.io/ios/app/bright-comets/id1523594527)

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.

**Highlights:** Locate visible comets, Real-time sky pointing, Red target marker guidance, Uses device location, NASA JPL ephemerides data

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Coffee | $1.99 | one-time |


## Frequently asked questions

### Is Comet Book free?

Comet Book is free to download, with no in-app purchases.

### Is Bright Comets free?

Bright Comets is free to download, with in-app purchases available.

### Which has better reviews, Comet Book or Bright Comets?

Comet Book is rated higher. Comet Book averages 5.0 out of 5 from 2 ratings, while Bright Comets averages 4.3 from 153 ratings.

### Do Comet Book or Bright Comets have ads?

Neither Comet Book nor Bright Comets shows ads.

### Which is updated more often, Comet Book or Bright Comets?

Comet Book ships an update every 6 months, and Bright Comets every 5 days. Most recently, Comet Book was updated on September 21, 2026 and Bright Comets on September 20, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*