APRS Tracker is a free Android application developed by Anton Nikanorov, designed for radio amateurs. It allows generating a passcode for the Automatic Position Reporting System (APRS) by callsign and sending location information to the APRS system.

The app has four screens, with the main screen featuring only one button to start or stop the tracker. The map screen shows the current position of the user, while the settings screen contains a list of settings such as callsign, generated passcode, a drop-down with icons for markers, text message field, minimum distance for sending the next point, minimum time for sending the next point, and a save button. The last screen is a passcode generator, where users can generate a passcode by their callsign.

Overall, APRS Tracker is a simple and easy-to-use application that serves its intended purpose for radio amateurs.