Simple enough, right? Not so fast. We prop up the hand-held mirror, snap a photo and check the results. The molding on the wall of the conference room reflects oddly in the image. OK, try again.

The Hand Mirror Plus features can be unlocked for a one-time payment of $4.99 (with an option to pay $10.99). I’m not an artist, and although I like having the option to write directly on my iPad ...