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.
史丹福大學原要1年時間完成的事,Apple用24小時就幫他完成了! https://qooah.com/2015/03/12/researchkit-usage/