PSK31 is a monitoring tool designed for iPhone users who want to keep track of PSK31 transmissions without the need for a computer setup. By simply placing your iPhone near your radio, you can tune in to PSK31 frequencies and observe decoded text effortlessly. The app offers a waterfall display of the audio spectrum, providing a comprehensive view of all PSK31 transmissions. Users can easily select specific signals by tapping on them for closer inspection.

With PSK31, users can quickly start decoding and displaying PSK31 transmissions within minutes of installation. This app is a convenient solution for ham radio enthusiasts looking for a portable and efficient monitoring tool on their iPhone.