Know when to look up, and where to look.
The ISS and Tiangong cross your sky for a few minutes at a time. Get the moment, the direction and a reminder.
Next pass over
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Live
Finding the next pass…
Computed in your browser
In the app
Four screens, one evening.
01 · Forecast
Your next observation, already waiting.
The next visible pass is on screen the moment you open the app: time, duration, peak height and where it rises and sets.
02 · Sky chart
Follow the path across the stars.
Constellations, the Milky Way and the planets, with the station's track drawn through them. Compass mode points the phone at it.
03 · Planetarium
Stand under it before you go outside.
A 3D sky you can turn with a finger, showing where the station will be against your real horizon.
04 · Widgets
Tonight's answer on the Home Screen.
Small, medium and large widgets show the next pass with its arc and times, so you know whether to step outside.