Aug 12, 2026 eclipse planner in a free astronomy app.
5,000+ downloads
About Mobile Observatory Astronomy
Mobile Observatory Astronomy is an education app developed by Wolfgang Zima.
How many times has Mobile Observatory Astronomy been downloaded?
Mobile Observatory Astronomy has been downloaded 5.3 thousand times. In the last 30 days, the app was downloaded 1.4 thousand times.
What is the rating of Mobile Observatory Astronomy?
Mobile Observatory Astronomy has no ratings yet.
Is Mobile Observatory Astronomy free?
Mobile Observatory Astronomy is free to download. The APK download size is 276.84 MB. The latest version available is 4.7.4. The last update was on July 22, 2026.
What are the requirements for Mobile Observatory Astronomy?
The app has a content rating of Everyone. The app has been available on Google Play December 2025.
Description
Mobile Observatory helps you prepare for the August 12, 2026 total solar eclipse. The app shows the eclipse path, local contact times, maximum obscuration, rendered sky view, safety notes, and calendar actions for your location.
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 4.7.4
🆕 Cities and observatories can now be searched together with country, region, and nearby-place details. 🆕 20 more asterisms expand the catalog to 51 star patterns, with improved search, guidance, and charts. 🔧 Coordinates now determine the correct offline timezone for local times and daylight-saving changes. 🔧 Improved location search, Sky View labels, multi-selection, popup actions, comet descriptions, missing sky information, and stability.
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Comments on Mobile Observatory Astronomy for Android
★★★★★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
★★★★☆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
★☆☆☆☆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.
★★☆☆☆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
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