QuestaSDR: New RTL-SDR Software for Android

Last year we posted about QuestaSDR, which is a simple SDR multi-mode GUI that is compatible with the RTL-SDR. Since then QuestaSDR has evolved, and is now available on Android devices as well. It looks to be a nice alternative to RF Analyzer and SDR Touch which are the most popular RTL-SDR Android apps. The description of Android QuestaSDR reads:

QuestaSDR - powerful and flexible, cross-platform Software Defined Radio Application (SDR). Built-in scheduler architecture provides integrate plugins, plugins kits and multi - UI. Typical applications are DXing, Ham Radio, Radio Astronomy and Spectrum analysis.

Support Hardware:
- RTLSDR Dongle

Main features:
- Dark, Ligth, Universal, Material application style
- Many spectrum settings (FFT size, waterfall FPS and color theme)
- AM/SSB/NFM/WFM demodulator
- RDS decoder
- Record AF file
- Frequency bookmarks
- Web remote
- Supported IF-adapter, upconverter, downconverter hardware
- Rig samplerate, frequency, level and iq disbalance calibrate

To start using QuestaSDR, you will need:
- RTL-SDR dongle
- USB OTG Cable - used to connect a RTLSDR to your Android device.

Connect the USB dongle to the USB-OTG, then insert the free end of the cable into the USB port of your Android device and launch the QuestaSDR! Now you can listen to live frequency range shortwave, VHF, UHF.

Feedback and bug reports are always welcome.

Please note that I am not responsible for any legal issues caused by the use of this application. Be responsible and familiarize yourself with local laws before using.

QuestaSDR - New RTL-SDR Compatible Android App
QuestaSDR - New RTL-SDR Compatible Android App
Promo QuestaSDR v3.3.1-b3

Notify of

Inline Feedbacks
View all comments


Just installed on Android 8.1.0 and it crashes when trying to connect to my local spyserver service which works fine with sdr#.
Motorola pda.


John Doe

Why do you need access to:

record audio
read the contents of your USB storage
modify or delete the contents of your USB storage
take pictures and videos
precise location (GPS and network-based)
read the contents of your USB storage
modify or delete the contents of your USB storage
full network access
prevent device from sleeping
change your audio settings
view network connections


For a good spectrum analyser, the display should be about 25% waterfall and 75% spectrum display, so that the relative RF level of signals can be displayed in the spectrum, and spectrum width (sweep) could be increased.


SdrPlay RSP2 not supported?


Direct sampling isn’t mentioned, so I’m assuming it’s not supported?


Not supported. Use upconverter.


Dose this has support for Tx? Will hackrf or LimeSDR be supported?