Yeah, we really need to build some stairs, don't we?

Every time I've ever tackled stairs in the past, it's been quite a bit of figuring.  

Well, go figure (pun not intended), someone comes up with a stair building app.  I've lost my purpose in life.  

Just fill in the blanks, like how tall the overall rise is, what your tread thickness is, how deep your treads will be ..

And out comes your stringer pa