Your project is great, and I especially love that you're doing this for privacy reasons on the device, instead of in the cloud. Congratulations on launching.
Wishlist: add LinkedIn, because about half of my contacts are for business.
A long time ago, FB for iOS would sync contacts to your iPhone and include an fb:/... link. I still have a few old contacts with the link. Those are the only ones that were updated and one that had a gravitar link.
None of my more recent contacts with FB links worked nor did my professional contacts from LinkedIn. The app was kind of useless to me.
This is a normal use case. You have to take the m out. But, I am glad he did that instead of forcing a FB login. I trust him based on his reputation, but a lot of people wouldn’t.