If you're a Backer - yes! Not sure if you are? This article may help: What is a Backer?

Backers, make sure you request to join our Google group, Novvia Backers. Here is where we will make announcements regarding new app releases (and new app builds!). You'll be able to help us do alpha/beta testing for future  versions of Signal Spy. Once we approve you to join the Group, then make sure to opt in with the Play Store here.