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 프로그래밍 예제(Swift): 마이크를 통한 소음 데시벨 감지 (마이크 권한 설정, 녹음 진행) http://yoonbumtae.com/?p=3751