"Core of the Heart" is the official app of Johnny Chang and the Core of the Heart community. It offers a virtual congregation where users can connect with like-minded individuals to strengthen their relationship with God. By signing up, users gain access to various programs such as live Zoom bible studies, Daily Devotionals, a plethora of live stream content, direct communication with Johnny, and more.

The app provides a platform for spiritual growth and community engagement, catering to individuals seeking a deeper connection with their faith. With features like interactive study sessions and a library of resources, "Core of the Heart" aims to foster a supportive environment for users to explore and deepen their spiritual journey.