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.
One-up Session って何? https://fessfunabashi.com/one-up-session-%e3%81%a3%e3%81%a6%e4%bd%95%ef%bc%9f/