Moby is in a closed test on Google Play. Anyone can join:
Join the testers group, [email protected], with the Google account you use on your phone (Join group). Click here to join : https://groups.google.com/g/moby-testers
After joning: Open the testing page with the same account and tap Become a tester. https://play.google.com/apps/testing/com.xlient.moby Install Moby from Google Play. It can take a few minutes after joining before the Play listing shows up for you.