# Solar Book vs Solar Coaster

The clearest difference is update cadence: Solar Coaster at every 3 months against Solar Book's every 14 months. Solar Coaster also leads on rating (5.0 vs 4.8). Solar Book's advantage is iOS requirement (12.0 vs 14.0). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Solar Coaster holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 4 and 2 respectively.

Solar Book ships an update every 14 months, Solar Coaster every 3 months. Both last shipped on November 2, 2026.

## The numbers

| Metric | Solar Book | Solar Coaster |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (4 ratings)](https://appshunter.io/ios/app/solar-book/id1078873201/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/solar-coaster/id1218422388/reviews)** |
| Number of ratings | **4** | 2 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 14 months | **Every 3 months** |
| Monetization | Free | Free |
| Size | 5 MB | 37 MB |
| Requires iOS | **12.0** | 14.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Vixen Co.,Ltd.](https://appshunter.io/developer/536188843) | [Steve Lidie](https://appshunter.io/developer/1869780159) |

## What reviewers say

### Solar Book

[App page](https://appshunter.io/ios/app/solar-book/id1078873201)

This app provides detailed information about solar eclipses, including timings for different phases based on your location. It allows you to view sequential images and star charts for planning and observation.

**Highlights:** Solar eclipse phase timing, Location-based eclipse calculations, Sequential eclipse image display, Star chart visualization, Past and future eclipse planning

**In-app purchases:** none


### Solar Coaster

[App page](https://appshunter.io/ios/app/solar-coaster/id1218422388)

Visualize the precise movements of the Sun and Moon with 3D graphs, eclipse details, and rise/set times. This app offers offline calculations for celestial positions and moon phases, making it ideal for astronomy enthusiasts.

**Highlights:** 3D movement graphs, Eclipse information and circumstances, Rise and set times, Moon phase and illumination, Offline astronomical data, Local horizontal coordinate system

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Solar Book free?

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

### Is Solar Coaster free?

Solar Coaster is free to download, with no in-app purchases.

### Which has better reviews, Solar Book or Solar Coaster?

Solar Coaster is rated higher. Solar Book averages 4.8 out of 5 from 4 ratings, while Solar Coaster averages 5.0 from 2 ratings.

### Do Solar Book or Solar Coaster have ads?

Neither Solar Book nor Solar Coaster shows ads.

### Which is updated more often, Solar Book or Solar Coaster?

Solar Book ships an update every 14 months, and Solar Coaster every 3 months. Most recently, Solar Book was updated on November 2, 2026 and Solar Coaster on November 2, 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.*