# SkyORB Classic Astronomy vs Comet Book

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.

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.

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.

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

## The numbers

| Metric | SkyORB Classic Astronomy | Comet Book |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (24 ratings)](https://appshunter.io/ios/app/skyorb-classic-astronomy/id338051358/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/comet-book/id604782335/reviews)** |
| Number of ratings | **24** | 3 |
| Positive reviews | 53.8% of reviews | **54.9% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 2 months** | Every 6 months |
| Monetization | Freemium | **Free** |
| Size | 143 MB | 10 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 9+ |
| Developer | [Stephane Denis](https://appshunter.io/developer/295455703) | [Vixen Co.,Ltd.](https://appshunter.io/developer/536188843) |

## What reviewers say

### SkyORB Classic Astronomy

[App page](https://appshunter.io/ios/app/skyorb-classic-astronomy/id338051358)

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:** Apple Watch app

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1-year Premium Subscription | $1.99 | per year |
| Premium Version | $3.99 | one-time |

**What reviewers like**

- 🌟 Great app for stargazing
- 🔍 Useful for identifying stars, planets, and constellations
- 📅 Helpful calendar of astronomical events
- 🌍 Accurate representation of the night sky

**What reviewers complain about**

- 🤔 Confusing and unintuitive interface
- 🐛 Frequent crashes and bugs
- 💰 Paywall for many features
- 🔍 Inaccurate or missing information
- 🔌 Drains battery quickly

**Reported bugs**

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- Incorrect or outdated celestial data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

**Requested features**

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


### 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


## Frequently asked 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.

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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.*