This app works pretty well especially in an emergency. The only problem is it must have internet to show detailed area info. In a pinch with no cellular Data, this could be very useful for main roads during a major emergency. I’m talking if worst ever were to come to worst, you might need an app offline. Sure it’s free, and is very detailed online. Nobody sells paper maps anymore sadly. Barely anybody does. But if you think about it, you aren’t usually going to be online in an evacuation because nobody is going to be keeping track of our Data plans. Better than nothing I suppose. But some primary roads would be useful.