Just a marketing tool
This application is "free", but it gives you hardly any functionality at all, unless you purchase the in-app dictionaries. Besides, all the in-app dictionaries I saw were German: German-French-German, German-Danish-German, German-Russian-German, etc. In other words, unless you speak German and unless you are willing to pay 10-80.00 euro extra, this app is a waste of time.
To be honest, Langenscheidts dictionaries are usually great, so if you happen to speak German and to be willing to pay for 10.00-80.00 euro for the dictionaries, this app may be perfect for you.
MagnusLe about Langenscheidt Wörterbücher, v8.4.271