As I recently tweeted @canopener this app. works brilliantly on my iPhone 5 running ios7.0.6. However on my ipad 3 ruining ios 6.1.3 there are a number of problems.
Minor - Under Library, when in Albums mode, the artwork is shown for only about one third of my iTunes albums.
Major - Under Library if I tap on the FLAC tab or the Inbox tab then the app. freezes. That makes Canopener useless as a flacplayer at the moment.
I recommend purchase of the app. but not until it is fit for purpose once more.