My kids are not at teenage age yet so I can't help you with that, but I know if that technology is available when they are that age, you better believe I'll use it. Good for you for wanting to keep track of your child. So many parents are "afraid" of their kids and don't go in their rooms or ask about friends and stuff. And then when their child gets into trouble or shoots student at school, they don't have any idea how it all "just happened" or that they had guns or drugs right in their own room. I think parents need to be more aware of where their children are and who they are with. Even if they trust the child, as you said you just want to make sure she is safe and where she is supposed to be and that is wonderful. By the way, I think kids have limited rights when they are living under your roof. My parents were the same with me and I always had to call them, they would come check to see if I was where I said I was, and they would go through my stuff if they wanted too. I knew they cared enough and none of my friends parents did any of that and they were all getting in trouble with the law and at school. Good for you. Oops, sorry this is so long, I didn't expect to go off on tangent here!!!