I think that’s the struggle with AR apps like these. It’s hard to maintain interest.
Although, those first few weeks when EVERYONE was playing Pokemon Go were legendary. That was something special. I remember sitting in the park in central Birmingham and there had to have been 100+ people playing. It crossed generations as well, saw people as young as 10 and 11 playing and people as old as 50+ playing. Randomly walking through the park near my house one day and bumped into an old manager at a previous job with his daughter both playing.