This is a paid app. 99cents will be requested after downloading. A calculator that can be quickly launched from anywhere with SAO Launcher. Currently only supports 4 functions (+, -, /). Great for simple math like calculating tips without fumbling to find the calculator app. And it's themeable too, like the rest of SAO Launcher. The Play Store forces DRM on paid apps, which messes with the extension code. That is why an in app purchase is used instead.