SEVENTEEN LIGHT STICK is an Android app developed by XLAB for fans of the K-Pop group SEVENTEEN. This official cheerleading tool allows users to connect to the official cheering rod and control various lighting effects during concerts. With the app, fans can enjoy interactive performances by inputting their seat number and syncing it with the stage lighting effects. The app also allows users to control the brightness, color, and mode of the lights through Bluetooth connectivity with their smart devices. Another exciting feature is the ability to apply SEVENTEEN member skins to the app's wallpaper and watch SEVENTEEN's YouTube channel for exclusive content. Users can also check the battery level of their connected cheering rod and update its software through the app. However, the app requires some selective access permissions, such as storage space, camera, and location, which can be changed in the app settings. Overall, SEVENTEEN LIGHT STICK is a must-have app for fans who want to enhance their concert experience and show support for their favorite K-Pop group.