No app skins available yet (just updated version 3.5.5 today).
I purchase version 3.5.0 of this app a while ago when it was on sale. Not until this latest update 3.5.1 has come up, its GUI is nothing special and many improvements were expected, I welcome and admire 2 innovations implemented in this new update: the pinchable resizing & reflowing of display text, and the swipable word-lookup,
When you swipe your finger tip over the screen from left to right, you can access the preceeding header word while you swipe in the opposite direction, you access the succeeding header word; just like you lookup a real, physical, printed volume. Both improvements are invaluable.
However, there is still a down-side wish list. No inline hyperlinks at all available on the display text. If you want to lookup any word when you get stuck on the current display you either have to mark and copy it to the clipboard and then paste it onto the search space to look it up. The you have to press the "history" page to regain access to your previous lookup header.
However, after doing this work-around, you will loose the ability to swipe back and forth the dictionary header words but only those words in your history which could be good or bad depending on what you want. Alternatively, avoid using of history page to do back-tracking the swipe feature wont be affected but you need to retype your previous header word again to continue which can be tiring. Hopefully, DioDict can come up with some good solution to this implementation problem soon.
Another improvement should also be done, i.e., the dimond bullets used on the display is a bit over sized, In my opinion, either a smaller hollow dimond or circle would make the display much better looking. This can be done very easily in no time.
Many cheers!
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jirojin about DioDict4 English Advanced Dict, v3.5.5