Rip off!! You have pay 2 dollars to unlock the 2 key!! – scientific graphing calc Review

I download this app since we're doing exponential equation in school a need a high power calculator. I download in hurry while doing homework. I finally open up the app to do my homework later, when I had time, only to find that while had everything I need, THE NUMBER 2 KEY WAS MISSING!!! So, I clicked and it asked me to pay 2 dollars to unlock. This app is waste, unless you only need do equation that don't involve the number 2.
Review by Old movie gal on scientific graphing calc.