I have been looking at the Bing Maps app on Windows 8 and 8.1 (it is the same).

It is surprising how poor it is. The web version is better, which is odd because you would have thought they used the same data.

Here is what I get from the app if I search for public transport between Derby and Birmingham (on a direct rail route):

Bing Maps on the web has no problem with this:

Here is another random example. Bing maps app cannot find Dubrovnik airport. A search only finds Dubrovnik.

Oddly, if you know where the airport is, it is in fact marked on the map.

Web app: no problem:

If Microsoft wants Windows 8 tablets to succeed, glaring problems like this need fixing. Before the release of Windows 8.1 later this year.