Free and convenient app for encrypted phone calls from Android. Uses the SIP protocol to interoperate with other apps and corporate telephone systems.

Install (Google Play) »

See ZRTP in action

See how a ZRTP-secure phone call is made with Lumicall.

Free Software

Lumicall is free software licensed under the GNU General Public License v2.0.

Github source code

Source code, issue tracking and community collaboration takes place on our Github project page.

To Github »

Build your own network

Read the Real-Time Communications (RTC) Quick Start Guide to find out how you can run a SIP service with Lumicall.