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.
iBooks更新增加夜間模式, 低光環境下閱讀更舒服 https://qooah.com/2011/12/07/ibooks-added-nighttime-reading-theme/