বক ফট কষটর এসএমএস.Sad SMS is an Android app developed by Smart Tech Bangla. It is a free app under the Education & Reference category and is a subcategory of Books. The focus of this app is to provide users with a collection of koster sms or sad sms that they can share with their loved ones to express their feelings.

The app is designed to help users find the right words to express their emotions and to keep their loved ones happy. With the app's collection of love sms, users can easily express their love and keep their beloved happy. The app is in Bangla, making it perfect for those who speak the language.