The thing is, it's a descendant of Ingress, but it feels like a cheap clone. It seems to be worse in some regards. I think Ingress does cache the photos it uses for portals. Pokemon Go is tremendously resource-hungry; I can play Ingress fine on my Moto G, but PGo's stated memory requirements are far larger, it crashes regularly (about every 5-10 minutes), and it gets very warm in the process. And the Pokedex is completely broken.