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.
謝絕洗腦教學, iTunes U讓你自學也能完成小學至大學的課程 https://qooah.com/2012/07/26/itunes-u-for-any-students/