Friend Compass

Here's a nifty idea I had a while back. I've occasionally had that issue where you're meeting up with someone and can't figure out where they are, particularly at big events. Sometimes there's a landmark we can refer to, but other times I really just want something that can just tell me which direction to walk in.

My idea for solving that is called Friend Compass. It just displays a simple compass but instead of (or, I guess in addition to) showing you which way is north, it shows you which way someone else with the app is. You pick a friend from your contact list, they get a message asking them to install/open the app if they want to be found. Once the pairing is done both apps would show where the other is relative to you.

There might be some tricky stuff to get good results in crowded areas with bad GPS reception, but hopefully with not too much effort Friend Compass could eliminate the entire class of "Where are you? I thought you said near the tree. No, I meant the other tree!" problems for good.