Mobile Observatory Astronomy
Mobile Observatory Astronomy is made and published by Wolfgang Zima. AppBrain is an independent app data site and isn't affiliated with Wolfgang Zima. The app name, icon, screenshots and description belong to Wolfgang Zima and are shown as published on Google Play.
AppBrain's verdict
Niche- Total installs
- 8.8 thousand
- Rating on Google Play
- 3.25
- 98 ratings
- Last updated
- August 25, 2026
Mobile Observatory Astronomy is a niche app, with 8.8 thousand installs. It doesn't have enough ratings yet to judge what users think.
Summary
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.
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,
- Keyword footprint lacks several common astronomy terms (planets, stars, night, space, etc.) compared to some competitors
Installs
Tracked by AppBrain- Last 30 days
- 1.4 thousand
- Per day
- 48
- 30-day average
- Play install range
- 5+ thousand
- Launched
- December 2025
Installs over time
Mobile Observatory Astronomy has been installed 8.8 thousand times. Over the past 30 days, it averaged 48 installs per day.
Rankings
Google Play top chartsGoogle Play Rankings for Mobile Observatory Astronomy
Competitors
Similar apps and more from Wolfgang ZimaAlternatives to Mobile Observatory Astronomy
More from Wolfgang Zima
Releases
Updates seen on Google Play- Version
- 4.7.5
- Launched
- December 2025
User feedback
Ratings and reviews on Google PlayGoogle Play Rating history and histogram
Comments on Mobile Observatory Astronomy for Android
Technology
Found in the app by AppBrain- Ads
- No ads
- Price
- Free
- Libraries
- 71
- App size
- 276.2 MB
- Content rating
- Everyone
Technologies used by Mobile Observatory Astronomy
About the app and developer
About Mobile Observatory Astronomy
Mobile Observatory Astronomy is an education app developed by Wolfgang Zima.
Install Statistics
Mobile Observatory Astronomy has been installed 8.8 thousand times. In the last 30 days, the app was installed 1.4 thousand times.
User Ratings
Mobile Observatory Astronomy is rated 3.25 out of 5 stars. The rating is based on 98 ratings.
App Information
Mobile Observatory Astronomy is freely available from Google Play. The app 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.
App Performance Report
Get a detailed PDF report for Mobile Observatory Astronomy with download trends, rating history, and key performance statistics — useful for competitive research or tracking your own app. Learn more
Get PDF Report — $29Developer information for Wolfgang Zima
Frequently asked questions about Mobile Observatory Astronomy
Is Mobile Observatory Astronomy free?
Yes. Mobile Observatory Astronomy is free on 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 Mobile Observatory Astronomy?
Mobile Observatory Astronomy 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 installed?
Google Play lists 5,000+ installs for Mobile Observatory Astronomy.
How do people rate Mobile Observatory Astronomy?
Mobile Observatory Astronomy scores 3.25 out of 5 stars, from 98 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: Sky Observatory: Star View, Astroweather - astronomy tools, Earth Observatory, Oxford Dictionary of Astronomy, Sky Map Live & Star Tracker.
Store listing
By Wolfgang Zima, from Google Play“Explore the night sky, planets and Moon. Free with optional Premium.”
Description by Wolfgang Zima Written by the developer, not by AppBrain. Click to read.
Mobile Observatory Astronomy is the free version of Mobile Observatory. Start with the sky map, rise and set times, Moon phases, and basic object data. Upgrade to Premium anytime for the complete toolkit.
Already bought Mobile Observatory Pro version 3 or later? You do not need to pay again. Open or reinstall Mobile Obs Pro Astronomy on Google Play with the same Google account.
★ WHICH APP SHOULD I USE? ★
• Mobile Observatory Astronomy: free download, optional Premium upgrade.
• Mobile Obs Pro Astronomy: classic paid Pro app with all features included.
Both apps offer the same complete toolkit after unlocking.
★ WHAT MAKES THIS APP UNIQUE ★
REAL TOPOGRAPHIC HORIZON
Other apps assume a flat horizon. Mobile Observatory downloads NASA SRTM elevation data and renders a photorealistic 3D terrain profile for any location on Earth. All rise and set times are computed against your actual landscape — not a theoretical flat line. Astrophotographers and serious observers rely on this for precision planning.
★ NEVER MISS AN EVENT ★
• Aurora alerts when geomagnetic activity spikes at your location
• Solar flare notifications from real-time GOES X-ray satellite data
• ISS visibility alerts with brightness and trajectory predictions
• Daily astronomical event reminders — conjunctions, eclipses, meteor showers
• Push events directly to your calendar
★ INTELLIGENT OBSERVING PLANNER ★
The built-in Observing Plan Generator creates personalized target lists based on your equipment (naked eye, binoculars, or telescope), location, date, light pollution level, and minimum altitude. One tap generates the best objects for tonight — no experience required.
★ TELESCOPE CONTROL ★
Connect directly to your computerized telescope via LX200, NexStar, or INDI protocol. Browse objects in the app and send GoTo commands — seamlessly integrated with the Observing Plan Generator.
★ COMPREHENSIVE FEATURE SET ★
• Photorealistic sky view with 45,000 stars (2.5 million with download)
• Augmented reality mode with live camera overlay
• Interactive 3D Solar System and VR/Cardboard support
• Complete deep sky catalogs: Messier, NGC, Caldwell, Hidden Treasures
• Solar and lunar eclipse predictions with worldwide visibility maps
• Galilean moon positions and Saturn moon tracking
• Live space weather dashboard with aurora forecast
• Home screen widgets and night mode
★ FREE-TO-TRY VERSION ★
Explore the photorealistic sky view, check rise/set times for Sun, Moon, and planets, view Moon phases, and browse basic object data — all for free. Upgrade to Premium to unlock the full observatory: satellite tracking, deep sky catalogs, push notifications, telescope control, the Observing Plan Generator, and much more.
Trusted by astronomers, astrophotographers, and stargazers since 2011. Continuously updated with new features and data.
Learn more at https://zima.co
Recent changes:
Version 4.7.5
🔧 Bug fixes and stability improvements.