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.
研究笔记 https://www.andrewsun.net/panta_rhei/%e6%88%91%e7%9a%84%e7%a7%91%e7%a0%94%e7%ac%94%e8%ae%b0