I only gave to stars, at first I thought this looks like a really good app., that I could use when I go back to school. Then when I went to sign up for premium and realized that the app expects the full years payment at once, most apps that I've used let's you choose monthly or yearly. Even if I end up paying a little more paying for app monthly. Right now tough times never know if you will get sick and be off for few weeks even months. It would be easier to pay $10/month than one bulk payment