Pocket spectrum analyzer + multimode radio + signal decoder on a Raspberry Pi Zero 2 W and RTL-SDR, used from your phone's browser. Sweep 0.5–1766 MHz, tap a signal to hear it, identify digital modes, decode pagers, APRS, sensors and ADS-B, record, scan and watch 24/7. Offline, receive-only, EN/ES.
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Updated
Oct 22, 2026 - JavaScript