Great work so far, but still more is needed

The app is very good on quality images and completeness. However, it can be much more versatile and useful if customization is allowed. With this I mean being able to study bones individually or on a structure that does not remove the pins every time it is rotated. It would be very useful if separated bones could be colored or highlighted somehow. If I am studying one bone I want to be able to see how is it connected to the others and additional shape without loosing it, for example... Also allowing personalization that is kept after the app is closed... Yesterday I selected the bones I needed to study and when I went to review them today, I noticed all my pin selections were deselected and I saw everything all over again... Because the App closed. The quizzes are very good once it is personalized...

Cornucopia11111 about Skeleton System Pro III-iPhone, v3.3.1