RF Analyzer

RF Analyzer

In-app purchases

About this app

RF Analyzer turns your Android device into a real-time spectrum analyzer for Software Defined Radio (SDR). Visualize and listen to radio signals around you - from amateur radio to broadcast signals and beyond.

Whether you're a curious beginner or a seasoned ham, RF Analyzer offers a hands-on, interactive way to explore radio signals.

FEATURES

- Works with HackRF, RTL-SDR, Airspy, HydraSDR or pre-recorded IQ files
- View live spectrum (FFT) and waterfall plots
- Demodulate AM, FM, SSB, and CW signals
- Record raw IQ samples for offline analysis
- A responsive and modern Material Design interface
- Scroll, zoom, and tune through the bands
- Built-in context-aware help and a full offline in-app manual

PRICING

You can try all features for free within the 60 minutes test period (only actual analyzer usage counts - so enough time to test out all features with all your devices).

If you like it, a one-time in-app purchase unlocks the full version - no subscriptions, no accounts, no ads.

This app is a hobby project, built with passion and countless hours of work. Supporting the app helps me continue developing and improving it. Thank you! 🙏

REQUIREMENTS

- Android phone or tablet (with USB OTG support)
- Supported SDR hardware (HackRF, RTL-SDR, Airspy or HydraSDR)
- Note: The RTL-SDR Blog v4 is fully supported.
- USB OTG adapter (USB-A female to USB-C for modern phones)
- This is not necessary for SDRs with USB-C connector (e.g. the HydraSDR)

LEARN MORE

Want to go deeper? The full user manual is available with signal identification tips, ham radio basics, and more: https://demantz.github.io/RFAnalyzer/

Have fun exploring, learning, and listening to radio signals :)

73!
- Dennis (DM4NTZ), Heidelberg, Germany


LICENSE

This application is released under the GNU General Public License v2. It is free software and the source code is available on GitHub.

LEGAL ISSUES

Please note that I am not responsible for any legal issues caused by the usage of this application. Be responsible and comply with your local law!

Ratings and reviews

I'm going to assume that the only way to view RF data using a phone is going to be by using a dongle to capture it? I looked at this to see if there was a rf signal turning on lights in my house or if it was just a bad controller and thankfully, if I understand the tutorial correctly, I don't need to waste time looking at other apps because this is not within a phone's capability without external hardware. This app does look to be very capable though with the correct hardware.

Works for a few seconds then static. I downloaded the rtl-str driver and said it installed correctly. Then I downloaded RF analyzer. Set it up properly, but the only station I could get was 1 FM, and 1 WX. Everything else was static. And then it would only work for a few seconds and disconnect. I'm on a galaxy s21 ultra so it couldn't be the phone. I guess it's time to give up.

I am very happy with the performance of this APP. I use it with my RTL-SDR (USB dongle). The author of the app was VERY quick to respond to my questions. It is a handy demod companion for my Tiny SA. I used it at a high school football game to hunt down a referee wireless microphone.

What’s new

RF Analyzer Version 2.1
- Version 2.1.1 fixes AM demodulation bug (was not working) and crashes
- Support for Airspy SDR
- Support for HydraSDR RFOne SDR
- Added Rational Resampler: Demodulation of arbitrary sample rates is now possible
- Switched audio output sample rate from 31250 Hz to 48000 Hz
- Automatically disable any Frequency restrictions when RTL-SDR Blog v4 is connected
- Multiple Bug fixes for app crashes and freezes