So, I downloaded Pokemon Go around July 20th iirc, and it worked more or less fine for a while. The last week or so I had been having problems opening the app while out and about. The other day when this happened I decided to try and see what I could do to fix it. When I went to see if it needed to be updated I got the message that "Your device isn't compatible with this version."
I thought that was kind of strange because I already downloaded the app fine? I checked the requirements and can't seem to figure out why it says it's not compatible?
I've got android version 5.0, and like I said, the app was running more or less fine before. The only thing I can think of is that I don't have enough RAM, but why would it allow me to download it in the first place, then? (And nearly everyone I know in person playing it has under 2GB of RAM)
It was fine for a couple of days, but now when I open the app it says I need to update it to continue playing.
I've been looking around for a fix (or at least a reason) for this problem, but I haven't found anyone with compatibility issues who already had the app downloaded and working.
 I want to stress that the app was already downloaded and working, and that since the update, the system requirements haven't changed.