I bought this time free app in the Amazon Appstore. In my last vacation when I was in Cologne, she has done very useful services. Whether you now have the nearest supermarket (Aldi, Lidle and Co.) wanted, a toilet or a very specific Frozen Yogurt shop, everything was shown to the smallest detail and with the positioning function of the mobile phone it is also known in which direction you look must move (some better and more accurate than Google Maps). Also can thus be all kinds of little things show that you at first glance might not see otherwise at the highest zoom level.