I downloaded Pokemon Go through the google play store in July. With the recent (mandatory) update (august 8, version 0.33) the play store now says "Your device isn't compatible with this version."
The official source for compatibility appears to be this page
My device is an SM-P900 tablet running android version 5.0.2, which has gps and wifi. My device seems to have roughly 2.7 GB RAM.
Has pokemon go changed to have higher or additional system requirements?