Cellink Neo is a utility application designed for iPhone users by EGEN Inc. This app serves as a secondary battery monitor for black box systems. It provides an interface to manage Cellink's Bluetooth control system, offering insights into the operation status, capacity, temperature, and control functions of the Cellink Neo battery.

The app displays essential information such as connected device details, battery capacity percentage, charge/discharge status, time estimation, battery temperature in Celsius, and input/output voltage and current. Users can also download screen configurations from the server, manage battery connections, select batteries, and edit capacity. Additionally, the app features automatic connection to recently paired devices, enhancing user convenience and overall app stability.