Wacai is a Chinese mobile app developer and the creator of a personal finance management mobile app. The app has two major functions. One, to serve as a bookkeeping service (launched in 2009) and two, a mutual fund trading feature that was added in July of 2013. Its most recent feature, incorporated in April of 2014, is a credit card manager, which is gaining popularity in the Chinese markets. The app currently has over 40 million users.