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.
然後怎樣? https://jingcastle.net/2016/02/28/%e7%84%b6%e5%be%8c%e6%80%8e%e6%a8%a3%ef%bc%9f/