Useless
Unless you are traveling on a couple of rivers, forget it. When you spend money on an app designed for river cruises, you would expect to find most of the river cruise rivers. Bought the app only to find after the fact it only includes a couple of major rivers, and NO DANUBE! I feel scammed.
Of limited use
Preparing to take a Danube cruise from Budapest to Nuremberg. This app looked appealing. The description is limited and deceiving. It only covers 4 rivers in Germany. They don't tell you that before you spend $4. Even if you were traveling one of the river routes they cover, the points of interest only lead you to a Wikipedia link for that location. You can just follow you own travels in real time by using google maps
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