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.

Is it on iPhone too? I only see an Android version.