If you think you've seen everything there is to see in social apps, think again. Mobile messaging app WeChat introduces more game-changing features bound to transform the social app playing field, and make life easier for all WeChat users: Voiceprint, WeChat's 6.2 update for iOS and Android, and WeChat for Windows and MacOS. 1. Use your voice as a password for app-access Never be locked out of your account again. WeChat's Voiceprint allows users to input their voice as a password for access to their account. Once enabled, the WeChat system will recognize the specific voice through intonations to verify the user's identity. How to set up Voiceprint: Log in to WeChat Go to Me > Settings > My Account > Voiceprint You will be prompted to press and hold the green record button, and to read a set of unique numbers. Once you have read the numbers…