Mobile Observatory Astronomy

4.7.5

Wolfgang Zima

2.83

93 reviews

5,000+
Downloads

Free

Explore the night sky, planets and Moon. Free with optional Premium.

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2.83 · 93 reviews · 5,000+ downloads

Download from Google Play

Mobile Observatory Astronomy is a free astronomy app that starts with a sky map, rise/set times, and Moon phases, with a Premium upgrade for the full toolkit. It differentiates itself with a real topographic horizon powered by NASA elevation data, enabling horizon-aware planning and eclipse visibility. The app is not ranked in any top list and currently has a 0.0 rating from 0 reviews.

Pros & Cons

Unique real horizon calculations using NASA elevation data
Comprehensive sky catalogs and multi-format viewing (AR, 3D, VR)
Integrated observing tools (Plan Generator, telescope control)
Free-to-try with a clear upgrade path to Premium

No top-list ranking currently,
Rating at 0.0 from 0 ratings (potentially limiting initial trust)
Keyword footprint lacks several common astronomy terms (planets, stars, night, space, etc.) compared to some competitors

About Mobile Observatory Astronomy

Mobile Observatory Astronomy is an education app developed by Wolfgang Zima.

Download Statistics

Mobile Observatory Astronomy has been downloaded 7.9 thousand times. In the last 30 days, the app was downloaded 1 thousand times.

User Ratings

Mobile Observatory Astronomy is rated 2.83 out of 5 stars. The rating is based on 93 ratings.

App Information

Mobile Observatory Astronomy is FREE to download. The APK download size is 276.23 MB. The latest version available is 4.7.5. The last update was on August 25, 2026.

Technical Requirements

The app has a content rating of Everyone. The app has been available on Google Play since December 2025.

Description

Explore the night sky with Mobile Observatory: realistic star maps, precise planet and Moon data, and observing tools for your location.

More data about Mobile Observatory Astronomy

Price	Free to download
Total downloads	7.9 thousand
Recent downloads	1 thousand
Rating	2.83 based on 93 ratings
Ranking	Not ranked
Version	4.7.5
APK size	276.2 MB
Number of libraries	71
Suitable for	Everyone
Ads	NO ads

App Performance Report

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Alternative downloads for the Mobile Observatory Astronomy app

Google Play Rating history and histogram

Rating history

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Downloads over time

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Mobile Observatory Astronomy has been downloaded 7.9 thousand times. Over the past 30 days, it averaged 34 downloads per day.

Changelog of Mobile Observatory Astronomy

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Developer information for Wolfgang Zima

Wolfgang Zima

mobile.observatory.app@gmail.com

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Comments on Mobile Observatory Astronomy for Android

★★★★☆ willie burch · Jan 19, 2026

There is so much available information in the upgrade. I haven't fully delved into it all, but what I have used is straight forward enough and very data rich.

★★★★☆ Vic R · Mar 8, 2026

Pro price doubled from 4.1.3 app loads much slower sky view loads slower restore all sky view settings does nothing

★★★★★ Skand Amrit · Jan 24, 2026

Best application I have ever it was famous they had discontinued the feature of free So they get downfall

★★★★★ A r godara Godara · Apr 12, 2026

Best astronomy app but one question why moon size is small manually size option next update plz

★☆☆☆☆ Alex Padron · Jun 8, 2026

I purchased the app initially 15 years ago. At least. And I have used it regularly since. Now it doesn't work. I have to purchase it again? It was initially a one time purchase. And im sure I paid well more than 15 bucks. it's not the money. it's the principalities. Now I have to buy again... what.

★★☆☆☆ Phil Wright · Aug 11, 2026

Very disappointed. Had the original app for a few years and very happy with it. Set home coordinates and all was good. Loved all the features like live sky, best of etc. etc. BUT then app would not open or upgrade so had to uninstall and can not reinstall. Now have this version which I can not use and many features I used to have are all chargeable. Can't even use sky view as apparently red ditch uk is surrounded by mountain ranges despite setting home location correctly. Will be uninstalling 😔.

★★☆☆☆ Derek Kilcoyne · Jun 18, 2026

I have been using the earlier version of this app for over 14 years. This latest version seems over complex and less user-friendly. I used to enjoy the "tonight's best" feature, and the section that required pointing my phone at the sky. I should point out, I am 76 years old, and this may be significant. Is it possible to reload the earlier version.

Google Play Rankings for Mobile Observatory Astronomy

This app is not ranked

Technologies used by Mobile Observatory Astronomy

21 permissions · 71 libraries

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Trust & Safety: Permissions include location (coarse and fine), camera, internet, foreground service, notifications, startup and Bluetooth-related permissions, and billing. The app relies on dynamic receivers and license checks, with a broad feature set tied to sky mapping, AR viewing, and telescope control. Review the privacy policy for details on data usage and consent.

Frequently asked questions about Mobile Observatory Astronomy

Is Mobile Observatory Astronomy free?

Yes. Mobile Observatory Astronomy is free to download from Google Play.

Is Mobile Observatory Astronomy still available?

Yes. Mobile Observatory Astronomy is on Google Play, and the last update we saw was on August 25, 2026.

Does Mobile Observatory Astronomy contain ads?

No. Google Play does not list Mobile Observatory Astronomy as containing ads.

How large is the Mobile Observatory Astronomy APK?

The Mobile Observatory Astronomy APK is 276.23 MB.

Is Mobile Observatory Astronomy suitable for children?

Google Play rates the content of Mobile Observatory Astronomy as suitable for everyone.

How many times has Mobile Observatory Astronomy been downloaded?

Google Play lists 5,000+ downloads for Mobile Observatory Astronomy.

How do people rate Mobile Observatory Astronomy?

Mobile Observatory Astronomy scores 2.83 out of 5 stars, from 93 ratings on Google Play.

Who made Mobile Observatory Astronomy?

Mobile Observatory Astronomy was developed by Wolfgang Zima. It is listed in the education category on Google Play.

What are the best alternatives to Mobile Observatory Astronomy?

People looking at Mobile Observatory Astronomy also look at these education apps: Astroweather - astronomy tools, AstroDeck, Oxford Dictionary of Astronomy, Eclipse Guide: Blood Moon 2026, Earth Observatory.

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