There is also a third alternative: Threema (https://play.google.com/store/apps/details?id=ch.threema.app...) is a privacy-focused messenger app that tries to cover its costs by *gasp* asking for money for the app! But of course those notoriously financially-conservative Swiss can't hold a candle to Signal, who first decided to give away their app, same as those other messenger-making companies flush with cash, and then found out that supporting all those users who download your free app actually costs money...