It’s actually doable:
According to your own position on the map and through a GPS (so also off-line), quickly finding the railway and underground stations and find out information about the relative stops (FR1, FR2, FR3, FR5, FR Roma Sacrofano/Viterbo, Ma, Mb, Mb1, Roma Giardinetti, Roma Lido) in a simple and clear way.
Looking up and finding the main Rome Town Halls, getting information about surface and population.
Quickly finding the nearest shopping center and streets to go shopping.
Combining data on the map and screening them according to the kind and adding them to your favorite ones to have a clear glance on what you are interest onto.
Checking on-line the train and bus timetable and get information about public transport road condition.