Tonight feed
A unified, chronological list of everything visible from your location — sorted by when to step outside, with live countdowns.
LaunchesISS passesEclipsesMeteor showers
Rocket launches · ISS · Eclipses · Meteor showers
Know when to look up.
Rocket launches, the space station, eclipses, meteor showers — visible from your own backyard, if you catch them in time. Horizon Alert tells you exactly when and where to look, and stays quiet when the sky won't cooperate.
9:41
◐ Clear · 22°
Tonight · Austin, TX
Visible from you
Launch · Go
T‑00:14:08
Falcon 9 · Starlink
SE horizon · look low & right
Skies clearing · 18% cloud
ISS pass
in 01:52:30
Bright pass · mag −3.4
WNW → overhead → SE · 6 min
Dark enough · sun −14°
Meteors
peak 02:40
η‑Aquariids
Radiant rising E · ~20/hr
Clear after midnight
Sound familiar?
You keep finding out the morning after.
A rocket arced over your city last night. A meteor shower peaked while you slept. The space station passed straight overhead and nobody told you. And the one time you did step outside on purpose — solid cloud. Catching the sky shouldn't take three browser tabs, a weather app, and a lot of luck.
How it works
Three steps, then you can stop checking.
No charts to read, no orbits to track. Set it once and Horizon Alert does the watching.
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01
Set your spot
Tell the app roughly where you are. That's all it needs to know which events actually clear your horizon.
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02
Let it watch the sky
It tracks every launch, pass, eclipse, and shower against your local darkness and cloud cover — around the clock.
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03
Step outside on cue
When something's genuinely visible, you get one timely ping telling you where to look. When it isn't, silence.
What it does
Everything overhead, filtered by what you can actually see.
Nearby map
A real satellite map centered on you, with launch pads pinned and a visibility ring drawn at true geographic scale — so you know which way to face.
Apple Maps · visibility ring
Smart alerts
Cloud cover and sun position are checked at the moment of each event. You won't be told to look up at an overcast sky — or a daylit one.
Cloud-gatedDarkness-awareNo false pings
Privacy in plain English
Your location stays on your phone.
Horizon Alert works out what's visible right on your device, using only a coarse sense of where you are. There's no account to create and nothing to sign in to — which is mostly just what it takes to point you at the right patch of sky.
Read the full privacy policy- Coarse location only — your sky, not your street.
- No account needed — just open it and look up.
- Nothing sold or shared — there's no profile of you to sell.
Don't miss the next one
The sky is putting on a show tonight.
Be the one who looks up.
Download once. The next time something's overhead and the air is clear, your phone will quietly let you know.