How can I use "The Old Reader" on Android? The Old Reader is so far my best replacement for Google Reader.

Is there a way to use it on Android, for example an RSS app that syncs with it?
The Old Reader's website has a list of apps that are known to use its API. The only Android app currently listed is: Listener Launcher which is an alternative Launcher, so probably does more than you want.

However a quick search of the Play Store for "the old reader" comes up with: The Old Reader (unofficial) app, and the gReader (free version) (paid version) app both of which claim to sync with The Old Reader, amongst other services.