A radio receiver for RTL‑SDR sticks, on Windows and Android

AM, FM and broadcast FM in stereo with the RDS station name and radio text, plus USB, LSB and CW for shortwave and amateur bands. You tune by clicking or dragging on the spectrum, zoom in on a signal and save stations you like. A noise blanker, noise reduction and an automatic notch filter help with difficult signals, and a Morse decoder reads CW.

The scanner sweeps the ranges you choose, such as airband, marine or PMR446, and can hold several active channels at once so you hear them side by side. Voice detection skips empty carriers and noise. Each conversation can be recorded on its own, and a log shows what was heard and when. A favourites scan watches your saved stations instead.

Aircraft from ADS-B on 1090 MHz appear on a map with their flight number, altitude, speed and track. The map works offline; with an internet connection it can show satellite imagery and add the airline, route and a photo. APRS stations and weather balloons can be shown on the same map.

• DAB+ digital radio, with the station list, now-playing text and slideshow pictures
• APRS positions and messages
• ACARS and VDL2 messages from aircraft
• POCSAG and FLEX pagers
• Temperature and humidity sensors on 433, 868 and 315 MHz (inFactory and similar)
• RS41 radiosondes (weather balloons) with their flight track
• SSTV pictures, from the air or from a recording
• Morse code across a whole band at once

On Windows also: AIS ships, satellite passes, and pictures from Meteor weather satellites.

PulseSDR can write down what is said as you listen, and translate it. This runs on your computer or phone with Whisper or NVIDIA Parakeet models that you download once; no audio or text is sent anywhere. Transcripts can be wrong, especially when the signal is weak.

Recordings are saved in a protected format with an inaudible watermark and play back in PulseSDR on the device that made them, with a waveform, the transcript and a translation. The library also keeps your saved stations, the scan history and the frequencies you muted or blocked.

The Windows version can share its RTL-SDR on your home network (rtl_tcp), so the Android app, SDR# or SDR++ can use it. On Android, listening carries on with the screen off, with lock-screen and headset controls.