Category : Books & Reference
This is just another useless reference app and only 3 "chapters" are free. Don't waste your time with this one.
Wasted my time not knowing it need to pay to learn
Crashes on startup
Keep looking, this app is not free :-( ' '
Very nice and interesting
"Hey guys, let's make only 3 chapters free! Then charge them $2 for the rest!"
I'm surprised that this app has only had 1k downloads; I mean, this app is the best and most helpful math app I've ever downloaded. Good job, excellent information.