I've tried both, and they don't seem quite finished to me. Vulcan doesn't allow me to log in as of the time of writing, and neither will let me view particular subs or manage subscriptions. On the plus side, the apps themselves seem to be quite fast and resource efficient (although the site being suddenly overrun has slowed everything down anyway), and I haven't had any freezing/force closes on either.

Luckily it looks like development on both is going strong, so I would keep watching for updates.