# Emerald Observatory for iPad vs Desktop Astro Clock

The clearest difference is rating: Emerald Observatory for iPad at 4.9 against Desktop Astro Clock's 3.7. Emerald Observatory for iPad also leads on ratings volume (99 vs 3). Desktop Astro Clock's advantage is monetization model (free vs paid) and device support (3 vs 1). 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.

Emerald Observatory for iPad holds the better App Store score, 4.9 against 3.7. That said, the two scores are not equally well evidenced: Emerald Observatory for iPad has 99 ratings behind it against 3, so its average is the more settled of the two.

Emerald Observatory for iPad ships an update every 5 months, Desktop Astro Clock every 9 months. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Emerald Observatory for iPad | Desktop Astro Clock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (99 ratings)](https://appshunter.io/ios/app/emerald-observatory-for-ipad/id364904759/reviews)** | [3.7 (3 ratings)](https://appshunter.io/ios/app/desktop-astro-clock/id1588806370/reviews) |
| Number of ratings | **99** | 3 |
| Positive reviews | 98.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 months** | Every 9 months |
| Monetization | Paid | **Free** |
| Size | 19 MB | 416 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPad | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Bjorn Freeman-Benson](https://appshunter.io/developer/1766829089) | [BEHR Consulting International](https://appshunter.io/developer/385816833) |

## What reviewers say

### Emerald Observatory for iPad

[App page](https://appshunter.io/ios/app/emerald-observatory-for-ipad/id364904759)

This app provides a comprehensive astronomical display on a single screen, offering detailed information about celestial bodies and timekeeping. It features a heliocentric orrery, rise and set times, twilight information, and moon phase details. Users can navigate through time and set alarms for astronomical events.

**Highlights:** Astronomical information display, Heliocentric orrery, Rise and set times for Sun, Moon, planets, Twilight times, Moon phase and orientation, World map of day/night regions, Eclipse simulator

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

**In-app purchases:** none

**What reviewers like**

- ✨ Visually stunning and beautiful design
- 💡 Extremely informative and data-rich
- 👍 Elegant and exquisite user interface
- 🚀 Flawless UX and intuitive design
- 🌟 Unique and nonpareil functionality

**What reviewers complain about**

- ⏳ Last update a year ago
- 🤔 Interface can be tough to decipher initially
- 🔄 Lack of recent updates
- 📱 Not available on iPhone/Apple Watch

**Requested features**

- Port to screen wallpaper
- Large wall clock version
- Apple TV version
- Support for Uranus, Neptune, and Pluto
- iPhone and Apple Watch versions


### Desktop Astro Clock

[App page](https://appshunter.io/ios/app/desktop-astro-clock/id1588806370)

This utility app displays time in various formats, including Julian, Sidereal, and GMT. It offers always-on display options, moon and meteor shower information, and customizable clock configurations. Widgets and a watchOS app are also supported for enhanced functionality.

**Highlights:** Multiple time formats (Julian, Sidereal, GMT), Always-on display with battery threshold, Moon phase and meteor shower information, Customizable display configurations, Widget support, WatchOS app with specialized displays

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Emerald Observatory for iPad free?

Emerald Observatory for iPad is free to download, with no in-app purchases.

### Is Desktop Astro Clock free?

Desktop Astro Clock is free to download, with no in-app purchases.

### Which has better reviews, Emerald Observatory for iPad or Desktop Astro Clock?

Emerald Observatory for iPad is rated higher. Emerald Observatory for iPad averages 4.9 out of 5 from 99 ratings, while Desktop Astro Clock averages 3.7 from 3 ratings.

### Do Emerald Observatory for iPad or Desktop Astro Clock have ads?

Neither Emerald Observatory for iPad nor Desktop Astro Clock shows ads.

### Which is updated more often, Emerald Observatory for iPad or Desktop Astro Clock?

Emerald Observatory for iPad ships an update every 5 months, and Desktop Astro Clock every 9 months. Most recently, Emerald Observatory for iPad was updated on November 1, 2026 and Desktop Astro Clock on October 30, 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.*