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.
醫生的槌子 https://www.brain-classroom.com/2013/02/%e9%86%ab%e7%94%9f%e7%9a%84%e6%a7%8c%e5%ad%90/