# Moon Book vs Eclipse Explorer

The clearest difference is update cadence: Eclipse Explorer at every 5 days against Moon Book's every 6 months. Eclipse Explorer also leads on iOS requirement (10.3 vs 12.0). Moon Book's advantage is review sentiment (90% vs 67%). On price, ads, in-app purchases and monetization model 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, Eclipse Explorer every 5 days. The most recent releases landed on July 7, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | Moon Book | Eclipse Explorer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.0 (1 ratings)](https://appshunter.io/ios/app/eclipse-explorer/id1252295023/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | **90.0% of reviews** | 66.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 5 days** |
| Monetization | Free | Free |
| Size | 22 MB | 47 MB |
| Requires iOS | 12.0 | **10.3** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Vixen Co., Ltd.](https://appshunter.io/developer/536188843) | [Joshua Berlin](https://appshunter.io/developer/1252295022) |

## 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


### Eclipse Explorer

[App page](https://appshunter.io/ios/app/eclipse-explorer/id1252295023)

Explore solar eclipses with detailed circumstances for your location between 1900 and 2100. Features countdown timers, Sun and Moon simulations, and real-time shadow mapping. Overlay weather data to avoid clouds during totality.

**Highlights:** Location-based eclipse circumstances (1900-2100), Countdown timers to eclipse events, Sun and Moon position simulation, Real-time Moon shadow mapping, Satellite and radar weather overlays, Offline map functionality

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Moon Book free?

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

### Is Eclipse Explorer free?

Eclipse Explorer is free to download, with no in-app purchases.

### Do Moon Book or Eclipse Explorer have ads?

Neither Moon Book nor Eclipse Explorer shows ads.

### Which is updated more often, Moon Book or Eclipse Explorer?

Moon Book ships an update every 6 months, and Eclipse Explorer every 5 days. Most recently, Moon Book was updated on July 7, 2026 and Eclipse Explorer on June 1, 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.*