I haven't played yet but want to try!
My phone is crappy and almost full PLUS it is only used online at home....could I still play it?
It's possible, just not ideal. The more Pok?mon you catch, the more items you collect, and the more achievements you unlock, the more storage the game will use. Also since the game locations are at real world locations and Pok?mon are found more commonly in area suitable to their type (i.e., water Pok?mon by water), and you'd have to jump from hotspot to hotspot, it doesn't make for the smoothest gameplay, however I can still be played that way.