Yanfook is the official mobile application of the Evangelical Free Church of China Yan Fook Church, designed to enhance the connection between members and the church community. This free iPhone app offers features that facilitate access to essential church information and resources, making it easier for users to stay engaged with their faith.

Key functionalities include push notifications for important updates and real-time announcements, a link to the church's channel for reviewing sermon messages from the past two weeks, and downloadable weekly worship programs. Additionally, the app provides an electronic membership card that allows users to maintain their personal information and track their spiritual growth, fostering a deeper relationship with the church.