Blackpink Lightstick is an Android application developed by CS_Cirwan Studio and is available for free on the Google Play Store. As the name suggests, this app is an unofficial lightstick for Blackpink Kpop fans. The app allows you to show off your virtual lightstick to your friends and fellow Blackpink fans.

The app has a simple and user-friendly interface, making it easy to use. Upon opening the app, you are greeted with a black screen that has the Blackpink logo on it. Once you tap on the screen, the lightstick appears, and you can change the color of the light by tapping on the screen again. The app also has a vibration feature that simulates the feeling of holding a real lightstick.

Overall, Blackpink Lightstick is a fun app for Blackpink fans who want to show their support for the Kpop group. However, it is important to note that this is an unofficial app and is not affiliated with Blackpink or their management team.