Im going to start out and say this should point you towards the right path to success, I had to take my NREMT B, 2 times to pass. I failed the first test studying only on this program. But that could have been a lack of my knowledge. So for my second test I reread the book a week prior to my exam, and highlighted anything that was important, I took notes, and every time vitals came up I wrote those down to remember for different age groups, I also had friends and family quiz me from right out of my book. About a month prior to taking my second exam I also purchased EMTprep online for about $34 this I spent countless hours on, that helped me more then this emt app. So if your asking should I invest in this app, I would say "no" this is a career field, its like working out... you need that to be in shape to help a patient or fight fire, so do the right thing and spend your time and money on EMTprep online and pass your first time. Good luck all you future EMTs!