Not free, need to purchase to use anything
Seriously guys, not only did I download your "free" app with no ratings just to give you a fighting chance of being good, you then ask for $2.00 to get each individual section of your one app. If I were to use your apps for any sort of education, I would be spending upwards of $100! Get it together people. Also, the "preview" videos seem just like YouTube videos that I can buy. No thank you.
