Swati Khandelwal:

Signal has already been providing fully end-to-end encrypted chat and voice calling features, but the newly added feature will make it even easier for privacy conscious people to convey their information face-to-face through video calling without compromising security.

There are a lot of options out there, but Signal is by far the easiest and most respected in encrypted communications. But what I still find most shocking is that I can’t passcode protect the app on iOS.