http://dealnews.com/Cerberus-Anti-Theft-for-Android-Lifetime-License-for-free/746832.html
1st 2 links @ dealnews takes you to their Facebook page with a link to download the Beta .apk in case you can't get through on Google Play or if it's easier -- I downloaded the .apk in Firefox, copied to my Dropbox folder, & got it from there on my tablet. The F/book link is https://www.facebook.com/CerberusAndroid/posts/472927216123259
The 3rd link takes you to the Play store for info on the app etc., which works to find & lock etc. a stolen/missing Android device. https://play.google.com/store/apps/details?id=com.lsdroid.cerberus
You get a free lifetime license when you set up the account with your Android device - they're getting hammered so it may take a try or three to get connected.