I am android developer, just started android development. I published my first android app which is calculator, I tried to put my best effort but still lot more that could be added in this application. I need feedback and suggestions on improving this application. I am providing the link below and hope so that senior developers here will give me decent reviews on how to improve this app. I want to make it best calculator app for android device.
https://play.google.com/store/apps/details?id=com.ahdeveloper.basiccalculator
https://play.google.com/store/apps/details?id=com.ahdeveloper.basiccalculator