'Cha Seba' Mobile App is a new addition for the development of Bangladesh Tea Industry. Tea and tea-related information like history, botany, environment, Bangladesh tea, saplings production methods for both tea and shade species, cultivation practices, soil and fertilizer management, integrated pest management, processing methods of black tea in factory, biochemistry of tea, tea economics and statistics, tea cultivation calendar, etc. are presented in both Bangla and English in the database very easily and consistently. Through the app, users will be able to communicate with respective scientist of BTRI. The app will be updated frequently. With the launch of mobile data or WiFi connection, one can download this app from Google Play Store only. After installing the app on a smartphone, offline access will be available without internet connection. Hope that this app will play a vital role in the development of Bangladesh Tea Industry.