Hands up if you have lots of duplicate and unsorted contacts on your phone so you never actually use the address book because it's, well, useless. Humin is a smartphone app that replaces the native address book and renders your contacts useful by giving them context. When adding a contact through the app it automatically adds location and time. If this person is registered with Humin as a verified contact this will also get tagged. Existing contacts can be improved by adding, for example, when or where you first met. The more people who register with Humin and get verified, the closer this gets to being a truly universal address book.

https://humin.com/products/humin