Fox Hunt - portapack-mayhem/mayhem-firmware GitHub Wiki
The Fox Hunt app is designed to help you with the Fox Hunt game, where you need to find transmitters. But it is not only helps you with that game, but you can find other signal sources with it easier.
You'll need to set the app to the required frequency. You can set AMP, LNA, VGA, and speaker volume. Speaker will play the AM signal it receives, for the game it is mostly a morse code. There is a signal strength widget, what is a great indicator when used with directional antenna!
The app supports external GPS and orientation module, so you can see your current orientation and position in the map. You can add markers, so you it can help you find the source. It helps a lot if you zoom in the map a lot!