OnAir

83 modes your SDR can decode

OnAir groups its receivers the way the app does: TV, broadcast radio, aviation, maritime, satellites, two-way radio, cellular and rail, pagers, IoT, weather and science, amateur radio, HF utility and general tools. Open a mode to see what it is, where to find it and what OnAir shows.

Plug in a radio. Pick a mode. Press Start.

Free, open source, no account.