I've got to say though, the reviews on the google app store are getting the side-eye from me. Lots of five star reviews that praise the features listed in the marketing. That's not all there is to it, but I'm not quite sure how to convey why they seem fake.. Did anyone else get that feeling?
Edit: And on more careful inspection, they do say that they bought the paid version after liking the free version. I may have jumped the gun on that one.
Not sure how those numbers are generated, but I get the same feeling as you.
Having said that, the app. does indeed have some areas for improvement, as enumerated by several folks here. But I think it's an excellent attempt at demystifying some of the recurring programming questions we've all seen (and been stumped on) at one time or another during interviews :)
Hah, no kidding. Fair enough.