This comes straight from Look4Sat’s own GitHub page, and it’s free. Need help installing?
What it looks like
About this app
Look4Sat tells you when satellites will pass over your head and where to look. Pick the International Space Station, a weather satellite or a ham radio relay, and it lists the upcoming passes, draws the path across a map, and tracks the pass live as it happens.
Satellite data comes from Celestrak and SatNOGS, so over nine thousand active satellites are searchable by name or catalogue number. The calculations run on your phone, so once the data is downloaded you can use it without a signal.
Set your location in the settings first, or the pass times will be wrong, and refresh the satellite data about once a week to keep predictions accurate.
From the app’s home page
- See the codeHow it’s made, every line is public
- Questions & commentsTalk with the people who make it
- Report a problemTell the makers something is broken
- All versionsOlder downloads and what changed
- LicenseThe rules for using and sharing it
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