Everyone who isn't offering help to the OP needs to chill out. If you disagree with his principles or parenting style, kindly move on. He's looking for help and that is supposed to be what he is to get here.
OP, did you ever find a good solution for your needs? As a father of four children, I understand your concerns. First, I use Sprint Family Locator for my children's phones. It's nice to know where they are at any given time and I setup points for their boyfriend's/girlfriend's houses, school, etc. If they are not in school within 30 minutes of school starting, I get a text message. If they go to their boyfriend's/girlfriend's houses after certain times (curfew), I get a text message. And at $5/month for up to four lines, it is a great deal.
As for apps, I have heard a lot of good stuff about
Mobile Nanny. Check it out and see if it does what you are looking for. It does cost about $50/year, but they do offer a a 14 day money back guarantee. And honestly, is a little over $4/month that much to ensure that your daughter is safe?
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