I am currently stuck on a really long bus ride home to visit my parents for the weekend. I feel so guilty because I left my heavy PMP textbooks back at my apartment. The exam is coming up in just three days and I feel like I am wasting precious time sitting here doing nothing. I am trying to use my phone to study but I have no money for apps. I was searching for a free pmp practice question just to keep my brain working. Does anyone else study on their phone?