Signal is a free, privacy-focused messaging and voice talk app
you can use on Apple and Android smartphones and via desktop. All you
need is a phone number to join. You can text or make voice or video
calls with friends, either one-on-one or in groups, and use emoji
reactions or stickers just like in other apps. signal is by far the best
when it comes to security, be it on the back-end or on the user-facing
side of the service. ... While WhatsApp encrypts messages and calls (and
that's enough for most users), Signal goes one step further and
encrypts the metadata too.
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