No step-by-step?? – Wolfram Calculus Course Assistant Review

My friend had this app and it derived everything for him while showing the step-by-step solution. Having the step-by-step is extremely crucial for me in calc 2 because I need to learn the method of integrals. I noticed that some answers shows step-by-step and some don't. Trig integrals have multiple form of answers and I like to know which method achieves what. It'll be nice to know all the possible forms of answers as well; however, it doesn't seem like this app have that feature. This bugs me because I paid $3.99 for the step-by-step. If I simply want to check my answers I'll just go on their free site to acquire it.
Review by Presidentaft on Wolfram Calculus Course Assistant.