SDR Pro: Radio Signal Analyzer

SDR Pro turns your Android phone or tablet into a professional-grade radio spectrum analyzer — no expensive hardware required. Plug in any RTL-SDR dongle via USB OTG and watch the wireless world come alive in real time.

═══ SEE EVERYTHING ═══

A buttery-smooth 60 fps waterfall display lets you watch signals scroll by as they happen. The live FFT spectrum shows you signal strength across the full tuning range at a glance. Touch the waterfall to tune — drag left or right to move frequency, pinch to zoom. No menus, no typing. Just point and listen.

═══ LISTEN ═══

AM, FM, and USB/LSB demodulation pipe audio directly through your device speaker or headphones. A built-in squelch control silences dead air so you only hear what matters. Real-time audio, synchronized to the spectrum — hear the signal the moment you see it.

═══ RECORD & REPLAY ═══

Capture raw IQ recordings to your device storage in standard IQ16-LE format — compatible with GNU Radio, HDSDR, and SigDigger straight out of the box. No conversion, no proprietary formats. Replay recordings on your phone as if they were live: the waterfall, spectrum, and demodulator all work exactly as they would with a real antenna. Rename, export, and share recordings with a tap.

═══ BUILT FOR LARGE SCREENS ═══

SDR Pro is optimized for foldables and tablets. The waterfall and spectrum expand to fill every pixel of your display — no letterboxing, no wasted space. Use your fold as a desk display and see more spectrum detail than any phone-sized view can offer.

═══ WHO IT'S FOR ═══

🔭 Ham radio operators — monitor repeaters, visualize bands, log activity
🔐 Cybersecurity researchers — inspect RF emissions, replay captures for analysis, decode protocols
📡 RF enthusiasts & makers — explore ADS-B aircraft, weather satellites, trunked radio, NOAA imagery, and anything else the air carries
🎓 Students & educators — the waterfall makes abstract radio concepts immediately visual and tangible

═══ HARDWARE REQUIREMENTS ═══

• Any Android device running Android 8.0 (Oreo) or later
• A USB OTG adapter or USB-C hub
• Any RTL-SDR dongle (RTL2832U + R820T chipset — RTL-SDR Blog V3/V4, NooElec, and compatible clones all work)

No root required. No cloud account. No subscription.

═══ PRIVACY ═══

SDR Pro does not collect, transmit, or sell any personal data. Recordings are stored exclusively on your device. No analytics, no ads, no tracking.

Tune in. The spectrum is waiting.