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.
https://9lib.co/document/wq20lgpz-從眾傾向憂慮產品過時與創新採用之研究以智慧型手機為例政大學術.html