Our project SCB (Speech Crypto Box) is designed for our custom hardware, arm based device. This experimental project with Jolla was interesting possibility to bring this technology to already available Mobile platform. And it exceeded our expectations. Works like a charm, even it's technology (mainly UI part of it) can be further improved.

And yes, we believe only in source code. Even in extent that we doubt security of this solution on Jolla because end point security issues, where we have no visibility or there is known vectors to access memory space of system. That's reason why we love our 100% source built solution on arm based hardware (which you can find a image on some tweets on my account).