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.
【Excel関数 徹底解説】CEILING関数FLOOR関数 時間の切上げ切捨てを15分単位で行う方法 http://hiroshi39jp.php.xdomain.jp/?p=344559