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.
蘋果日報副刊 ... https://cat-sky.tw/2010/10/07/%e8%98%8b%e6%9e%9c%e6%97%a5%e5%a0%b1%e5%89%af%e5%88%8a/