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Look4Sat vs tracker: catalog facts
Look4Sat	tracker
Free Free and open source under the GPL-3.0.	Free Free and open source under the Apache-2.0 license.
Android	Windows, macOS, Linux, Command line
Over 9000 active satellites from Celestrak and SatNOGS Search by NORAD catalog number or name	Shows satellite positions and trajectories in real time Includes a sky view and continuous world map
Android only Predictions depend on accurate location data	Uses a terminal interface Automatic orbital data updates use CelesTrak
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: Apache-2.0
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 8, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.