To all the people here screaming about SMS bad! I feel like for me signal was like an iMessage for android, like one could get their family to use it by just replacing their SMS app with it. It just worked. With a seperate app its like useless cause most people dont seem to care about end to end encryption and just want to use 1, maybe 2 apps. Yes SMS is horrible but it helped with adoption cause it was the app you could just get your same text messages in but if the other person had signal you had more features. Similar to how iMessage works