iOS App for REC Battery Management System using dedicated REC BLE module. Battery pack parameters such as voltages, current, temperatures, state of charge and health are displayed. General tab is used to display important parameters while dedicated tabs can be used to display advanced battery pack information. An alarm pop-up sign informs the user in case of any system error or alarm, containing its diagnostics. Charging tab enables the user to set charging voltage and current. After logging interval is set in the Settings tab, application logs all battery parameters and makes 24h based folders on the build-in SD card. Data can be easily transferred to connected device for analysis.