End-to-end encryption and privacy controls.
Message and call for free* around the world.
Group conversations made simple.
Say it with stickers, voice, GIFs and more.
Reach your customers from anywhere.
什么最重要? http://www.reformedbeginner.net/%e4%bb%80%e4%b9%88%e6%9c%80%e9%87%8d%e8%a6%81%ef%bc%9f/