This App is used for finding the measurements needed to construct a Stair Stringer. Measurements are in inches or centimeters. It calculates stair rise and run, stair angle, stringer length, step height, tread depth, and the number of steps required for a given run of stairs. You can select to create stairs for a fixed run length and rise or to find the run length with a fixed rise. You can choose a standard mount where the top step is below the landing or a flush mount where the top step is even with the landing.