the service will encrypt all messages, phone calls, photos, and videos moving among [the devices].
Moxie Marlinspike is involved, so they have a chance of getting it right, and no one, even WhatsApp, will be able to know what you”re saying, texting, viewing, &c. (Unless, of course, your widget is running malware, or the opposition can get their mitts on it.)-: They claim this is available on nearly a billion devices—this is a really big deal.