Exactly what I wanted

I was looking for a database of openings that I could easily study in spare moments. I have some books which talk about opening theory and variations, these are interesting but I am not yet at that level. The most useful things I have found are videos from the Saint Louis Chess Club and this app. Quiz mode is fabulous, and you can quickly flip from the quiz to full openings. The only criticism I have is that the search function is not robust (if I type "queen Indian" it will not find "Queens Indian"). But its still easily worth the price!

aranpura about Chess Openings Pro, v4.1.1