Tune & listen
Explore live spectrum and waterfall activity with AM, narrow FM, wide FM, USB, LSB, and CW modes. Adjust bandwidth, gain, squelch, and frequency correction.
FieldSDR
Radio tools for Android
Your RF
field kit.
Tune the spectrum. Map signal coverage. Track aircraft. Turn your Android device and a compatible RTL-SDR into a portable radio toolkit.
USB OTG or a compatible network source required for live RF reception.
Tune. Survey. Map the spectrum.Live RFSpectrum & waterfall
GPS surveysSignal coverage maps
1090 MHz ADS-BAircraft tracking
On-device filesAudio, IQ & survey exports
01 / Explore the signal
From a signal
to the bigger picture.
Receiver controls, recording, and mapping in one Android app.
Record & revisit
Capture WAV audio and raw IQ with SigMF metadata. Keep recordings and presets together, and replay saved audio or compatible IQ captures.
Map RF coverage
Record GPS-linked measurements and view them on a heatmap. Compare average power, peak power, noise floor, and estimated SNR.
Track aircraft
Receive 1090 MHz ADS-B directly from an RTL-SDR or connect to a dump1090/readsb feed. Explore tracks, range rings, altitude colors, and aircraft details.
Take your data with you
Save survey sessions and export measurements as CSV or GeoJSON for analysis outside the app.
Make it your setup
Connect through USB OTG or rtl_tcp. Use saved presets, tuner-gain diagnostics, and light, dark, or system themes.
02 / In the app
See it in action.
Promotional screenshots use demonstration data.
03 / Get started
A receiver.
A phone.
A place to explore.
What you need
- An Android device running Android 8.0 or later.
- A supported RTL-SDR receiver and USB OTG connection, or access to a compatible network source.
- An antenna suited to the signals you want to receive.
- Location permission for GPS-linked surveys; internet access for online maps, aircraft details, and photos.
You can also view a compatible dump1090/readsb network feed without connecting a USB receiver. Recordings and survey files stay in your selected device folders.
Built by PsychroCalc.
Questions, feedback, or an idea for FieldSDR? Get in touch.
With thanks
Good tools
build on good work.
FieldSDR uses RTL device code adapted from GNU Radio 4 and Mode S demodulation adapted from dump1090. Aircraft information and photos come from HexDB, Planespotters.net, and Airport-Data.com.
Maps include Google Maps and OpenStreetMap through osmdroid, with aircraft artwork from RexKramer1 and contributors. Photo credits and bundled license notices are available in the app.