Very good app for the price and has a very extensive database of openings. Kelley is very enthusiastic in the videos and doesnt put me to sleep like some other guys that do videos on YouTube. The only thing that I would fix really is the search engine. I think the engine should have a way to sort by section. For example when I search Sicilian defense, it only shows me a few of the variations and some repeats. The only way to find a specific variation is if you typed the specific section number or the name of the variation. Or categorize each major opening and have sub categories for each variation under them. Otherwise excellent app and cant beat it for the price. Would recommend it to all players beginner,club and masters
Crawlski about Chess Openings by ChessOpenings.com, v1.9