Look4Sat: open-source Android app tracks 9000+ satellites offline
tom_doerr · x · 2026-09-16
Look4Sat (1.3k GitHub stars) is an open-source, ad-free Android satellite tracker and pass predictor inspired by Gpredict.
- Pulls data from Celestrak and SatNOGS to track 9000+ active satellites
- Search by NORAD catalog number or name; computes orbital positions and passes relative to your station location
- Predicts passes up to 10 days ahead and shows transceiver data
- Built with Kotlin, Coroutines, Jetpack Compose and Navigation; offline-first
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