What is the name of the app in Vietnam?

This application is becoming more and more common in Vietnam.

Jian Yue is an App for chatting and making friends with strangers, which is very popular among young people in China and Viet Nam. The audience of the platform is China boys and Vietnamese girls. In Vietnam, girls are used to making friends and studying in Vietnam. In China, more and more boys begin to understand the customs and habits of Vietnamese and Vietnamese girls.