I remember trying out a zombie running app ~15yrs ago and am a fan of the concept. That was a podcast pretty much, audio-only storyline in your ears describing proximity/urgency/etc. I didn't grant this thing GPS access (work computer), but my immediate goal was to figure out how much attention it wants while running. The real problem nowadays (running in a city on city paths) feels like I would be oblivious to the people/cars around me and end up a safety hazard.