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.
你必需要道的 iOS 9.0 十五大功能及改進全面剖析! https://qooah.com/2015/06/09/everythings-about-ios-9/