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.
叢發性頭痛 https://www.brain-classroom.com/2019/07/%e5%8f%a2%e7%99%bc%e6%80%a7%e9%a0%ad%e7%97%9b/