I tried to enter my information into the fitness calculator, and every other line or anytime I paused I would get an in app purchase pop up. It was very distracting, and time consuming to wait until you could X out of the app for purchase and get back to what you were doing. Once I got all of my information entered, i selected calculate, the app crashed loosing all the data I just entered. I ended up deleting the app after that. Wasn't worth my time, sorry.