Best Calculus Resource

I had to switch classes three weeks into the current semester and have been playing "catch up" ever since. Ive tried books, apps, websites,MOOCs—some helped; others, not so much. Then I found this app. Its exactly what I needed: all of the material in a first-year Calculus course is covered, and its explained well in simple, straightforward, everyday English. There are examples and illustrations; even interactive animations. It even has practice problems designed to be representative of exam questions. Theres nothing to download, and nothing else to buy (as far as I know). Its like having a personal Calculus tutor who fits in my pocket and costs only $3. If you find a better Calculus app, Ill eat my hat (I dont wear hats, but you should still buy this app).

tommytwoeyes about Calculus FTW - Deep Insight into Solving Calculus Problems