Who is eligible to use WatchBack? Watchback Support September 20, 2018 14:03 Updated Follow WatchBack is available to users in the United States over the age of 18 years old. Related articles Is there a limit to how many devices I can download the app on? How do I sign up and create an account? How do I participate in a Sweepstakes? What is WatchBack? Is WatchBack free? Comments 0 comments Article is closed for comments.