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.
シンクロ http://www.slj-co.jp/2018/04/18/%e3%82%b7%e3%83%b3%e3%82%af%e3%83%ad/