...that said, Pokémon Go could sure use a lot more caching. It seems that (didn't confirm with a packet sniffer, but latency says it all), for example, it redownloads all Pokéstop data whenever you visit it. That's IMO utterly ridiculous - a Pokéstop is pretty much a permanent fixture (an ex-Ingress portal), it doesn't change, and the user itself is expected to mostly stay in the same geographical area. I don't see any good reason not to cache at least the visual stuff.

Which brings me to the general problem of the hipstery approach to development - download and redownload everything from Internet ad infinitum, as if everyone had broadband and electricity was free.