Untappd seems like the better of the two. I tried to use Beerby a few times and it was hell. The signup was a pain, and then the app didn't load properly.
Not sure what issues you had but we'd be happy to debug with you, have tons of Android users that like the experience but Android never surprises me to have some device specific issue :) beerby@levlr.com
I wish Untappd was on Android! :(