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.
[iOS 5 Tips] 認識全新的通知中心,關掉不要的項目! https://qooah.com/2011/11/06/ios-5-tips-notification-center/