Today, WeChat quietly introduced a new feature VoicePrint for iOS devices. It lets users login into WeChat account without password just by speaking set of numbers loudly.
There was no official announcement but the feature is now available to most of the iOS users. To use this feature, you need to enable this feature. You need to verify your Voiceprint first to use this. The WeChat will use your voice to verify your identity. It is very similar to fingerprint reader.
We can also expect the same feature for Android devices. As of now, it is not available for Android but there is no official word. We will update this post once we have more information about this feature.
Source: TheNextWeb