RF Field Hunter

RF Field Hunter is an offline-first field tool for radio direction finding and RF investigation work.

The app can be used with or without SDR hardware.

Without SDR hardware, RF Field Hunter works as a practical field tool for maps, GPS position, compass heading, manual pins and bearing markers. It can help you document suspected signal directions during field work.

With RTL-SDR hardware, RF Field Hunter can also support live receiver workflows such as RF monitoring, spectrum, waterfall and audio features.

SDR mode requirements:
- Compatible RTL-SDR USB dongle
- USB OTG adapter
- Android device with USB host support
- Separate third-party SDR Driver app installed from Google Play

Key features:
- Offline-first field workflow
- GPS position display
- Compass heading and bearing tools
- Manual field pins for RF notes
- Map-based field navigation
- Optional RTL-SDR receiver mode
- Optional spectrum, waterfall and audio monitoring
- No central RF server connection in this release
- No user account required
- No ads

Important SDR note:
RF Field Hunter remains useful without SDR hardware. Live SDR receiver features are optional and depend on external hardware and the separate SDR Driver app. RF Field Hunter is not an official RTL-SDR product and is not affiliated with the SDR Driver developer.