Smart Letterbox

此應用程序通知多少個字母都投進信箱。

This application is made for the organizations which needs to notify how many letters are dropped into their letterbox. User gets notification whenever letters are dropped in to the particular letterbox. It also maintain the letterbox details for example how many letters are dropped into the letterbox, at what time letterbox has opened by the pick up boy. And also user can check the letterbox summary.