Happy to join the Gelings closed test — I'll commit to the full 14 days with real usage. Small disclosure: I built PeerPlay, a free reciprocal-testing exchange, after going through this exact requirement myself — no obligation, just mentioning it in case you're ever short after this post. Joining via the Google Group now.
https://play.google.com/store/apps/details?id=com.testerhub.app