Developer's DescriptionBy Stan StudiosColorful Calculator...Colorful Calculator,come and choose your favorite color!If you like this app, please buy Donate version to support our development- Two modes ( Traditional / Formula ) for selection- Support for using % ( Percentage )- Enter each operator symbol will calculate and display the answer, and also display complete formula on top in formula mode- Intelligent automatic correction input error (for example, automatically fill in right parentheses)- Support drop-down display history- Can paste on Lucky icon or custom icon- Button can set vibrate/beep- Can set to keep the screen on- Support landscape screen- Automatically adjust the font size of the screen- 4 button skin