Look4Sat: Satellite tracker

Arty Bishop

About this app

Track satellite passes with ease!

Thanks to Celestrak and SatNOGS you have access to over 9000 active satellites.
You can search the entire database by NORAD Catalog Number or the satellite's name.

Orbital positions and passes are calculated relative to your location.
To get reliable data make sure to set the station position via the app Settings.

The application is built using Kotlin, Coroutines, Jetpack Compose and Navigation.
It is now and always will be completely ad-free and open-source.

Main features:

• Predicting satellite positions and passes for up to 10 days


• Showing the list of currently active and upcoming satellite passes


• Showing the active pass progress, polar trajectory and transceivers info


• Showing the satellite positional data, footprint and ground track on the map


• Custom TLE satellite data import is available via Three Line Element .txt files


• Offline first: calculations are made offline. Weekly TLE data update is recommended.

Ratings and reviews

First of all, love love love the app. I use it all the time to supplement my SatNOGS station. I've noticed that I cannot remove satellites from my "Passes" list under certain conditions: - The satellite has de-orbitted and its catalog number is no longer among published TLE. - The catalog number changes. I can add the new Cat number satellite, but can't remove the old. And, as the old TLE becomes outdated, it becomes inaccurate Still, awesome little app.

This app looks great! However it is a bit challenging to interpret the frequencies for linear repeaters. It would be better if the range for both uplink and downlink were displayed (which can be much wider than typical 3 kHz SSB). Also, frequencies are displayed reversed from common nomenclature (typically I see uplink/downlink, e.g. in terminology like V/U, but this app uses the order downlink/uplink).

LOVE IT!! I use this application every day for tracking amateur and other satellites! It is accurate on the doppler shift which is extremely helpful! Though, I wish there was a button or something to update satellite data or add a new ones. And, I would like a frequency range filter in the area that you choose the satellites you want. Overall, this is the only tracker I can find that is perfect for me! Thanks alot!!

What’s new

* Added required tweaks to support Android 17 (API 37)
* Added ACCESS_LOCAL_NETWORK permission check to support network data output