I've tried to use the Android app and have never had any success with it. I always get an error message along the lines of "error connecting to network". Is there a known issue with the app? It looks really neat would be cool to use it!
Yesterday when the site was down the Android app was also affected. So it wouldn't have worked for anyone during that time.
If you try it again (and make sure your internet is enabled) it should work now. If it's still giving you that error you could try going into the settings and then tapping "create new account key".