Drag the Tile into the active area when editing the Quick Settings menu in order to use it. Tap on the tile to launch the floating Calculator, you can also drag it around your screen. You can use the calculator to perform simple math operations such as adding, subtracting, multiplying and dividing, while the app you had open still works as normal. Opening the Settings gives you the option to choose between one of four themes, option for transparency effects as well as other various settings. You also have an button to launch your device's built in calculator if you need to solve more advanced calculations. This simple app has been designed in such a way that it functions and looks like a part of stock Android operating system, with a clean user interface, attention to details, simple yet effective animations and material design at its core. App idea, design and icon by Adam Lapinski: http://www.yeti-designs.com.