It's not exactly the same, but I can vouch for StreetComplete being an incredibly good/similar game. You walk around the real world, and the app points out missing data in OpenStreetMap that you can fill in easily. You get the dopamine of a number going up, help dethrone proprietary map dominamce, and get some good excercise in in the process.
You wouldn't be stuck with the fog, you would be able to toggle it on and off. The purpose is to make it obvious which areas you've already seen, so that you can know which areas of the world you still have yet to explore!
Its a nice idea , but I will hate the way these tech giants choose to implement it.
99% of implementation would need location to be tracked 24x7 and stored in their server . If someone would have a local or private way to do this , I'm exited.
It works great! When I was on paternity leave and went out for walks with the baby in the stroller every day, it was a bit boring to just walk the same route each time. I downloaded the Fog of world app and set my self the goal of walking every meter of every street in my part of town before the end of my leave. That made it much more fun, buuuuut I haven't used it after that...
You can see this in Waze if you open the map editor. you can only edit a certain radius around where you've been, so your editable area is like a fog of war.
So... how do you open the map editor these days? I used Waze and added roads and stuff back in the day before Google bought it, but I just opened the app and can't seem to get back into that "mode". Sorry for the dumb question...
This is reposted all the time and the answer has kept being: Pikmin Bloom. It's F2P, you reveal the areas you physically visit and the rest of the map is grey. It'll track your steps and location in the background, so all you have to do is have your phone on you.
Because of the GDPR, Google offers a download of all collected data about you. When you have your location history enabled, this should be part of it. If that's in a useful data format to parse, one could program this with the actual data of one's movement
Y'all should try Ingress. 😅
Doesn't really have fog of war, but you do get to visit art in search of portals for portal-keys. 😜
It's the company that made Pokemon Go's more-serious first app that came out years before P-Go did, as one of the first of its kind, though it only got interest from the more niche communities. I played it until G+ got slaughtered, as it was the main base of communications and Ingress communities.
Everytime somebody of your family or friends is inside the known area there should be an alert: reinforcement has arrived.
Or an alert about new options if you unfog a new building like a restaurant.