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.
http://www.srrsh.cuhk.edu.hk/zh/%E7%AC%AC%E5%9B%9B%E5%B1%86%E5%8D%9A%E7%BE%A4%E6%9B%B8%E7%AF%80