AstroAlert

In-app purchases
100+
Downloads
Content rating
Everyone
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About this app

AstroAlert shows you exactly which satellites, planets and deep-sky objects pass above you.

Using NASA data and TLE calculations, AstroAlert delivers scientific accuracy in a simple and immersive interface.

Free Features:
✔ Satellite passes near your location
✔ Planets, Sun, Moon
✔ Deep-sky objects
✔ Full astronomy glossary
✔ Fun facts
✔ NASA Photo of the Day
✔ Solar System animation

AstroAlert+ Premium:
⭐ Automatic personalized alerts
⭐ 1,000+ detailed celestial objects
⭐ Deep-sky content unlocked
⭐ Early access to new features
⭐ Unlimited experience

Turn your phone into your personal space control center.
Updated on
Jan 10, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
This app may collect these data types
Personal info
Data is encrypted in transit
You can request that data be deleted
Committed to follow the Play Families Policy

What’s new

New update!
Track the ISS live in real time.
Minor bug fixes and improvements.