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.
剛才想說 ... https://cat-sky.tw/2013/08/09/%e5%89%9b%e6%89%8d%e6%83%b3%e8%aa%aa/