SDRTouch

SDRTouch is an innovative Android application that transforms your mobile device with USB host/OTG support into a high-functioning portable software-defined radio (SDR) scanner and spectrum analyzer. By harnessing the capabilities of external hardware SDR receivers connected via USB, this tool empowers you to delve into a world of diverse radio communications.

The app lets you effortlessly listen to and record a plethora of live audio transmissions including FM stereo radio with RDS, weather updates, emergency broadcasts, air traffic, and even the audio from analog TV signals. It offers extensive frequency coverage, ranging between 20 MHz and 2.2 GHz based on the hardware in use. Among its key features, the application is capable of demodulating multiple signal types such as FM, AM, narrowband FM, and both upper and lower sidebands.

In addition to listening to traditional broadcasts, users can explore hidden digital data streams through the integrated RDS monitor. This feature decodes information broadcast by FM stations, providing insights into program types, broadcast countries, time signals, station identifiers, alternative frequencies, and comprehensive RDS carrier statistics.

An attractive advantage of this software is its autonomous nature—it operates offline, eliminating the need for a data plan or internet connectivity. You can use it wherever you go to uncover the secrets of the radio spectrum.

Please note that to utilize this functionality, you must connect an SDR receiver to your Android device with a USB OTG cable. The software is compatible with a wide array of USB radio tuners, from generic RTL2832U RTL-SDR sticks to a variety of specialized models.

Keep in mind that the game is still undergoing development, and users may experience crashes. It is also important to review compliance with local laws before you download and operate it, as the creators will not assume responsibility for misuse.