Push-to-Talk over Cellular
Free, open-source two-way radio networking for Android devices. Serverless backend on Cloudflare Workers + Durable Objects, WebRTC audio relayed via Cloudflare Realtime. All audio is DTLS-SRTP encrypted on every hop (relayed, not end-to-end) -- OpenPOC's own servers carry only signalling and floor control, never your audio, and no audio is ever recorded or stored.