I have a somewhat different perspective. Not featured by Apple ever, in fact I had to fight for six months to get Alicewinks accepted as an iBook (vs. video vs. app). Then, 9 months later, Apple introduced a bug in iOS 7 that made my iBook non-functional (links crashed) that was not fixed until iOS 8, eight months later. Almost everything in this arena is a crap shoot. So, get what you can.