calcS16free for iOS

This is calculator. CalcS16 free-. FreeVersion, (no ad banner).-. Hexadecimal calculation.-. Moving-view is implemented for typing miss.-. Use variable font size for misreading.-. Support metric prefix.( G,M,k,m,u,n,p)Flick to up/down, you will be understand the operation.when you want to g the numeric pad. "S" key is recommended.detail . This is the calculator app with sequential processing. . Mixed calculation of hexadecimal is possible. . if you do not touch screen during 30s. then screen change to clock. . Backgound color is changed by a time.( 0-10:Blue 10-16:Green 16-24:Red) . add metric prefix : "exp" double touching. . convert metric prefix : "=" double touching.please give me advise for usability improvement.