Great app! One of a few apps that may force me to take my lazy ass off a chair, shut down my laptop, leave my startup business for a while, and go for a run 😍
One curious thing though. As you were using San Francisco in your example, I'm wondering how you plan to address the neighborhoods' safety down your route. If you are a hip startup founder running with a shiny new iPhone in your hand, you better not enter certain places in the city hunting fancy artifacts, unless you are ready to risk getting hunted by another fairytale creature IRL.