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.
Facebook App正在測試一個會煩死你的通知功能! https://qooah.com/2013/03/22/facebook-app-tested-annoying-pop-up-alert/