App isn't working. I tried to login with Facebook and a new Xperia phone and it just went back to the login screen.
Thank you so much for reporting. Looks like Facebook revoked some permissions! No idea why. Please try logging in with another provider in the mean time.
It appears the underlying problem is the volume of traffic has tripped something at both of these providers. Google actually works, just incredibly slowly. Facebook says I need to submit the app for developer review—but I did that a while ago and when I go to https://developers.facebook.com it says I'm all set... I will try to figure out what's going on.
If you're interested in the app, please create an account using a password—you'll be able to add Google/Facebook in "Settings" later.