VibeSDR vs UberSDR

VibeSDR is a mobile-first software-defined radio (SDR) receiver — and far more than a single-server client. It speaks multiple SDR server protocols and does its own demodulation of the raw IQ with a clean-room DSP engine. Pair that with a GPU-rendered waterfall, native background audio, on-device decoders and maps, plus voice and in-car control, for a genuinely great SDR experience on any iPhone — whatever receiver is behind it. WHAT YOU CAN CONNECT TO • Remote SDR servers — native support for UberSDR, OpenWebRX / OpenWebRX+, and KiwiSDR, all behind one interface, with a directory chooser in the instance picker. • Networked rtl_tcp — connect to a remote rtl_tcp server and VibeSDR demodulates the raw IQ itself. DISPLAY & WATERFALL • Custom GPU waterfall and spectrum, rendered with a Skia shader for a smooth, high-frame-rate display independent of the server. • Portrait and landscape layouts, ProMotion 120 Hz, haptic tuning feedback. • Classic colour palettes (GQRX, KiwiSDR, CuteSDR, SdrDx, OpenWebRX), VFO glow controls, and a spectrum backdrop image. TUNING & CONTROLS • VFO drum with inertia scrolling and a dual-drum waterfall zoom. • Full mode set — USB, LSB, AM, SAM, FM, NFM, CW — with passband sliders. • Noise reduction, noise blanker, squelch, AGC, volume and mute. AUDIO • Native audio engines running outside any WebView, so playback survives app suspension. • Background audio on both platforms. • Lock-screen, Now Playing, CarPlay and Apple Watch controls with frequency + station metadata and station/bookmark skipping. • AAC recorder with share sheet. VOICE CONTROL • Siri — "Hey Siri, tune VibeSDR" then a frequency, a station name, or a band; it tunes with the right demodulator and step, even in the background over headphones, CarPlay or the lock screen. DECODERS & MAPS • On-device decoders — RTTY, NAVTEX, WEFAX, SSTV, Morse, and speech-to-text. • Server maps — HFDL aircraft, digital and CW activity maps, fully embedded. STATIONS & BOOKMARKS • Instance picker directory across UberSDR, OpenWebRX/OpenWebRX+ and KiwiSDR receivers, with country flags, favourites and an auto-connect default. • Bookmark and band-plan search with live EiBi schedules. • Visual Tuning System (VTS) — nearby-station bar, band-crossing popups and station skipping. • Live chat, and Share a tuned station as a tappable deep link. NEW: DEEP LINKING • Tap a vibesdr:// link to connect straight to a receiver and tune to the shared frequency — no hunting through the picker. VibeSDR is free software under the GNU GPL-3.0, built by Stuart Carr with AI assistance from Claude (Anthropic). VibeSDR is a receiver client and is not affiliated with the SDR servers it connects to.

UberSDR makes your iPhone or iPad the front end of a real radio receiver, anywhere in the world. Pick one from the public directory — dozens of them, run by enthusiasts from Scotland to Brazil — or find a receiver on your own network. No account, no sign-up, no hardware: you are listening within seconds. Tune by spinning the frequency dial, dragging the waterfall, or tapping a marker. Signals arrive on a live spectrum and waterfall you can zoom and hold. Choose LSB, USB, AM, SAM, NFM, FM or CW, set the passband by hand, and pull a weak station out of the noise with noise reduction, a notch filter and squelch. Shortwave broadcasters, the amateur bands, aviation, marine, time signals and stranger things besides. A band plan and live DX cluster spots say what you are hearing; bookmarks take you back to it. Audio carries on when you lock the screen or move to another app, with the usual controls on the lock screen. Everything stays on your device. Nothing is collected, and there is nothing to sign in to.