Pokemon says need to update to continue bit when I say ok it takes me to goggle store which says installed. Can not play game. Been this way for 3 days.
I've had other apps do that in the past. There may be an update for the app that Google hasn't pushed to your account yet. You can either wait or uninstall the app and reinstall it. The newest version should install. I ended up just uninstalling the apps and reinstalling. I don't have the patience to wait. Hope this works for you.
I got it!!! Spread the word!!! If stuck on infinite loading screen and/or signed out and also stuck on pokeball. Go to Google Chrome Incognito mode.(This is for your phone won't recognized you changed your password) Sign in to your Google account and change your password. Now open Pokemon Go. It will then notice you changed your password and ask you to sign in. In a few moments you will be playing Pokemon Go!!! Happy Training!!!!