WeChat is a mobile text and voice messaging service developed by Tencent in China.
The app is one of the most popular downloads and is one of the largest standalone messaging apps by monthly active users.
First released in January 2011 it has over 600 million active users in August 2015, only 100 million of which were outside of China.
To put that into context that is only 100 million less users than Facebook Messenger. This increased even further in 2016, with the messaging service boasting 864 million active users.
The app is available across multiple platforms such as Android, iPhone, BlackBerry, and Windows Phone while web based clients on Windows and OS X also exist.
WeChat boasts many features, although the most popular is its instant messaging service. Users can send text messages, voice messages and stickers to other users. The sending of saved or live pictures, as well as coupons and videos is possible in either an individual or group chat.
Another feature is WeChat Pay, a digital wallet which allows users to pay with their mobile device and send money to contacts. In China, users can pay bills, transfer money and pay in stores. In 2014, WeChat created a feature which distributed red virtual envelopes to coincide with Chinese New Year. Traditionally, people give each other money gifts in a red envelope during the holidays, with WeChat seizing upon this tradition and taking it virtual.