I found this app because of the website. I loaded it because I thought it was reflective of that website. After 3 weeks, I was prompted to upgrade to the full product. Why would I do that? Apparently the full program is free online. I decided to use the website for the rest of the program. I've finished week 3, started week 4, and I'm going strong. I think the program works, although I've had to add some stretching to avoid injury.