# Moon Book vs Solar Coaster

The clearest difference is iOS requirement: Moon Book at 12.0 against Solar Coaster's 14.0. On price, update cadence, 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.

Moon Book ships an update every 6 months, Solar Coaster every 3 months. The most recent releases landed on July 7, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Moon Book | Solar Coaster |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/solar-coaster/id1218422388/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | 90.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 3 months** |
| Monetization | Free | Free |
| Size | 22 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

### Moon Book

[App page](https://appshunter.io/ios/app/moon-book/id906552724)

This app visualizes lunar eclipses, showing viewing times and directions from your location. Plan your observations by setting specific locations and previewing eclipse phases.

**Highlights:** Lunar eclipse viewing times, Direction of eclipse visibility, Location-specific eclipse phases, Pre-set observing locations, Overseas eclipse start times, Thumbnail images of eclipse phases

**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 Moon Book free?

Moon 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.

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

Neither Moon Book nor Solar Coaster shows ads.

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

Moon Book ships an update every 6 months, and Solar Coaster every 3 months. Most recently, Moon Book was updated on July 7, 2026 and Solar Coaster on September 22, 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.*