San Francisco Map and Walks

I went to tour San Francisco, on foot, and driving. I needed an application just like the navigation, that would be directing me through the points of interest. By suggesting a route both on foot and on a car. Continuously telling me what i could visit very close by, and telling me to head in a general direction of a certain, previously set destination. I thought this app is the one that would be suggesting me points of interest on the way to my destination. I thought i would know whats closer to me and whats too far to go on foot. This app is of no use other than giving you a brief info about the places u might want to visit in San Francisco