TouchCalc Free is a calculator app for Symbian S60 5th mobiles such as Nokia 5800 XpressMusic, X6, N8, C6, N97 and 5530 XpressMusic. Use this form like you would use a regular calculator. Landscape mode is optimized for keyboarded devices, while keyboardless devices should be used in portrait mode.
The last button lets you access the last-used functions; a list of all supported functions can be had via the menu button. Open the Options menu to start graphing.
TouchCalc runs ok in my N97
free version there is startup nag asking you to purchage pro
supports precision up to 14 decimal digits
generally design ok