Yes. for Islamabad and Rawalpindi City. you can use it without having to switch on your data connectivity.
for People on roaming, it's a great relief. Before visiting the city you can download this app and familiarize yourself about the city.
You can use GPS mode from the MENU to find your location on the map (blue dot)
You can search for places from among thousands of Points of interest and get them ordered by their distance from your current location.
Islamabad Map Offline
This app has access to :