When I try the app, tapping "sign in with google" gives an error:
You can't sign in from this screen because this app doesn't comply with Google's secure browsers policy. If this app has a website, you can open a web browser and try signing in from there.
You can't sign in from this screen because this app doesn't comply with Google's secure browsers policy. If this app has a website, you can open a web browser and try signing in from there.