Appears to be a complete and unabridged electronic version. The entries that I have compared against the print Duden have been identical. I have had no problems with the app itself. The history list is not limited to 15 words, as stated on the description. Keep in mind this is not a translation dictionary, but German-German.

Each German word in the dictionary has extra "l"s in it. For instance, walschen instead of waschen or Gelbot instead of Gebot. I would like my money back please. How could this have become approved by Apple?

Having used this app for less than 24 hours, two issues are immediately apparent. What another reviewer referred to as extra "L"s are in fact syllable marks, which appear just like the lower case letter "L". While this explains their presence, it does not in any way excuse it. At best they a distraction, and at worst they will lead to erroneous memorization and spelling. I will also seek to get my money back for this application. Either use a font that is workable, or remove the syllable marks. Since they are impeding more than helping, I would suggest removing them. In addition the sound module, an advertised feature, does not appear to be working on my iPhone. Until the publisher corrects the syllable mark problem my recommendation is to stay away. 1 star.