Unfortunately, RoboKiller does not support Apple's iTunes Family Sharing. If you have another iPhone you'd like to activate with RoboKiller, you'll need to use a different Apple ID to purchase a membership.
Still have questions? Ask a live support agent!
Live Chat is available 10AM - 9PM EST. Simply tap "Chat" on the "Contact Support" page in the RoboKiller app. Also available on www.RoboKiller.com