Signal

Regardless of who endorses him, Moxie is hostile to anyone that threatens his control over the project. He also has a very high opinion of the Google Play store despite that coming with Google's ToS and Google Play Services. He does everything he can to shutdown alternative modes of distribution. I would read this before installing and contributing to Signal's userbase, especially if open source and/or F-Droid are things you care about.

You need to give to the company signal your private phone number..

I love Signal because of the automatic end-to-end encryption. Even though Whatsapp now has that, too, I still prefer Signal because it's more transparent about key handling. I would love them to add an opportunity to use it without a phone number. This is the only thing I don't like because you can't stay anonymous when using Signal.

This requires a phone number for verification which forces users to enter a phone number, no one is using it actually, and this isn't an anonymous messenger, and as like other companies they collecting data as well, nothing so special about it.

• Can't make calls on desktop
• Can't register on devices without service (so your wifi-only phone is scewed)

So basically this FOSS app is great if you can afford it