WeChat is a free messaging app for smartphones that offers video and voice calls, videos, photos, games, stickers, and text messages to help you stay connected with the people who matter most.
WeChat is interoperable with Weixin. For more details on the interoperability between WeChat and Weixin, visit「My Account」>「WeChat and Weixin」> 「What is the difference between a WeChat user and a Weixin user?」