Horizon Alert
Real-time sky alerts near you
Free · Designed for iPad. Not verified for macOS.
Horizon Alert tells you exactly when, where, and how to look up — and only when you can actually see something.
A "Up Next" feed gathers every event visible from your location into one chronological list: rocket launches, ISS passes, meteor showers, eclipses, spacewalks, and more. Each one shows a live countdown and which direction to face.
A "Nearby" map view centers on you with launch pads pinned on real satellite imagery and a visibility ring drawn at true geographic scale.
Real visibility intelligence:
• Cloud cover at launch time, fetched per location
• Sun elevation, so daylight launches aren't dressed up as visible
• Distance from the pad, calculated as a great-circle bearing
Smart alerts you'll actually trust:
• Choose your timings — 1 day, 12 hours, 2 hours, 30 minutes, 10 minutes, or T-zero
• Notifications auto-cancel if conditions degrade
• If the sky unexpectedly clears, you'll get a "conditions just cleared" alert
ISS overhead passes:
• Rise compass, peak altitude, set compass, brightness
• All predicted from your location, with countdowns
Built privacy-first:
• No accounts, no analytics, no third-party tracking
• Your location stays on your device
• The only thing sent off your phone is a rounded latitude and longitude to fetch a cloud forecast for your general area
A clean, dark-mode-native experience for anyone who wants to look up.
Ratings & Reviews
Point your phone at the sky — introducing the new Sky view.
• New Sky tab: hold your phone up to identify planets, the Moon (and its current phase), and bright stars in real time.
• The main feed is now "Up Next" — clearer about what's coming.
• You'll now see a heads-up when the feed can't refresh, so you always know when you're viewing saved events.
• Haptics and reliability improvements throughout.
The developer, Matt Strelecki, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Matt Strelecki
- Size
- 2.8 MB
- Category
- Entertainment
- Compatibility
Requires iOS 26.4 or later.
- iPhone
Requires iOS 26.4 or later. - iPad
Requires iPadOS 26.4 or later. - Mac
Requires macOS 26.4 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 26.4 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Horizon Alert