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24 alternativesLook4Sat
Look4Sat provides an Android satellite tracker and pass predictor, with information sourced from Celestrak.
About Look4Sat
Look4Sat is an open-source Android app for tracking satellites and predicting their passes over a user's location. It is inspired by Gpredict and is described in its repository as a radio satellite tracker. Satellite data comes from Celestrak and SatNOGS, and the README states that the database covers over 9000 active satellites. Satellites can be searched by NORAD Catalog Number or by name.
Positions and passes are calculated relative to the user's location, so the station position must be set in the app's Settings to get reliable results. Calculations run offline, and the README recommends updating TLE data weekly. The project is licensed under GPL-3.0. Platform support listed is Android only.
Key features
- Predicts satellite positions and passes for up to 10 days
- Lists currently active and upcoming satellite passes
- Shows active pass progress, polar trajectory, and transceiver information
- Plots satellite position, footprint, and ground track on a map
- Searches the satellite database by NORAD Catalog Number or name
- Imports custom satellite data from Three Line Element .txt files
Best for: Android users interested in tracking satellites and predicting passes, particularly amateur radio operators.
Good for
- Calculations are made offline, according to the README
- The README states the app is ad-free and open source
- Licensed under GPL-3.0
Watch out for
- Reliable results require the station position to be set in Settings
- The README recommends a weekly TLE data update
- Listed as available on Android only
Look4Sat at a glance
- Category
- Education & Learning › Space & Astronomy
- Type
- Open-source project
- Pricing
- Not confirmed. Check the site
- Platforms
- Android
- Open source
- Yes · Source code
- Language
- English
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
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Look4Sat FAQ
Does Look4Sat need an internet connection to calculate passes?
The README states that calculations are made offline. It recommends updating TLE data weekly.
Can I use my own satellite data?
Yes. Custom TLE satellite data can be imported from Three Line Element .txt files.
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