Asla Calculator app for iPhone and iPad

App generates question for and it need users to complete the expression. Complete more rounds, users will be more familier with Arithmetic. Also app can be challenging through disable part of operator.

Main functionality
． Expression verify : Users can input their own expression and press equal button to verify
． Changeable theme : Users can apply their favorite theme to app
． Switchable operator : Through long press on a operator button, app will restrict users to use the operator.
． Simple User interface : To serve children, we design a easy-to-use user interface

Thanks for downloading the app and hope you enjoy it.