QTH.app

Please note: This app is for licensed Amateur Radio operators only.
QTH.app is an APRS® client application exclusively for the macOS platform. It connects to the APRS network via radio or Internet to help operators receive, transmit, and visualize information being shared over APRS.
The Automatic Packet Reporting System (APRS) is a digital communication protocol used by amateur radio operators to share realtime information like position, weather, messages, and telemetry over radio frequencies and the Internet. APRS enables tracking and monitoring of assets such as vehicles, weather stations, and portable devices, making it a versatile tool for both hobbyists and emergency communications.
Operators can connect using the Internet via APRS-IS or transmit over RF via a radio connected to the computer using a KISS Terminal Node Controller (TNC) or directly via an audio interface. Also supports GPS connections over serial or Bluetooth to augment the built in macOS Location Services.
Incoming station reports are displayed on the main map and can be selected to view detailed information, such as latitude, longitude, speed, heading, and more.
Exchanging text messages over APRS brings a familiar feel as it adopts the a similar user interface to Messages and integrates with your Contacts.

Important:
QTH.app follows a “freemium” pricing model. QTH.app is free to receive APRS traffic. You are welcome to use it for free, in receive-only mode, for as long as you would like. However, to enable transmit, it requires a one-time in-app purchase.