A lot of material – CT-ART 4.0 (Chess Tactics) Review

I just bought this app at the recommendation for a new player to learn and practice on. It has a ton of material and puzzles in it, the only thing that gets me is the lack of introduction to a section. There is a pop up telling what the next section is but that seems to be it. Perhaps a more detailed theory page then go into the puzzles. That is why it is getting a 4 out of 5 because it is lacking that one explanation piece.
Review by rbrins on CT-ART 4.0 (Chess Tactics).