This looks exactly like what I've been looking for. I love the idea of using phone proximity as the only way to add friends.

I think it will be very important for the onboarding process to be effortless, so you should focus on that. Until you reach some kind of saturation, most people will be downloading the app because a friend wants to add them. Having a way to generate a QR download code on my phone when I "add" a friend so they can take a photo and then download it, and immediately connect us, would be huge.

Do you have any kind of development plan for new features?