The goal when setting tiles from wall to wall is to end up with tiles at the walls that are of equal width on each side, creating a natural symmetry. This app is a simple tile layout tool that will calculate these dimensions quickly and easily. By simply entering your tile width, grout width, and distance from wall to wall, the app will give you measurements for one row of tile. It also gives you a starting point from which to set your tiles. Can also be used for any number of projects where you need to end up with and equal spacing on the ends such as wainscoting or dentils.