Corner Calculator

this application is a Calculator that can be used while other application is operated

main feature is below
- simple Calculator (Four arithmetic operations)
- shown as overlay (shown over other applications)

I hope this application help for
- share calculation result by SNS as soon as possible
- record calculation result into other application like a note pad as soon as possible

Explanation for special button
[E] ->　close application
[C] ->　remove current input value(calculation result is kept)

Application features
- It can be used simultaneously with other applications by displaying on top of other applications. (This is similar to small app in old Xperia ,this application is floating above other application)
- All buttons and result display are shown at the edge(corner) of the screen, so it won't interfere with your operation for other applications.