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.
找到最嚴重彈App的Bug,iOS版Facebook穩定性爆升50%! https://qooah.com/2014/08/13/facebook-engineers-kill-ios-bug/