After tutoring on monday I became aware of the back-button on the iPad-version looked a bit too much like a play-button flipped in the wrong direction.. This was a crucial issue because of the placement of this button: back buttons usually are placed on the top left of the screen, but this is on the bottom left. It is therefore important that this is a clear and logical button. As usual the process went something like this: Visual research, sketch and evaluate (evt. test)..
In my opinion this is now a much clearer button and symbol. You can’t mix it with a play-button, and it’s a pretty conventional version adapted to the rest of the visual style of the app..