The Good: Humin makes your contact list more powerful by syncing with social networks and finding people nearby. The app lets you text or call using an intuitive swipeable interface. The Bad: The app can't track incoming missed calls unless the caller leaves a voicemail. The Bottom Line: With better ways to search your contact lists, and tons more information for each contact, Humin is an excellent replacement for your iOS dialer. Humin Phone and Contacts is a replacement app for the default iPhone dialer app -- replacing the icon with the white phone on a green background that you touch every time you want to make a call with the Humin dialer. Though it might feel strange to change the most fundamental function on your iPhone, Humin makes your contact list more social by using location services, social networks, and your calendar to bring in more information about the people you communicate with.It's also important to note that this a significant change to one of Apple's core iOS functions. Obviously, making calls is at the heart of every phone, and Apple allowing a third party to replace a core feature is a pretty big deal. It's the first app I've used that takes over a core function of my iPhone, and after using it for awhile, I think it does an excellent job.Getting started with HuminWhen you first launch the app, you'll be required to give access to your iPhone contacts, then you'll need to connect with social networks. Humin uses your social networks and your location to give you more information about your contacts. When you're finished connecting to social networks, you'll see your Humin contact list. Using the iOS default calling app, making a call requires you touch the icon, quickly search through contacts by swiping or touching a letter from the alphabet on the right to find the person you want to call. You can also use a search field at the top to find a contact.A new way to find contactsWith Humin, the experience is different. While you can still swipe through your contacts, there is no alphabet indicator on the right, making the search field your primary method for tracking down a contact. You'll also notice that each contact has their Facebook photo as a thumbnail and if you touch and hold the thumbnail, you can swipe it right to call, or left to text the contact. But here's where Humin is uniquely useful. You can also find a contact based on natural language such as "the person I met last week" or "my friend who works at Google." Humin uses your social networks, tracks when you add contacts, and accounts for your current location to find the people you're looking for. Maybe you can't remember a name, but know the contact went to University of California, Berkeley. With Humin you can type in "studied at UC Berkeley" and the app will display all contacts who went to college at UC Berkeley (as long as they have that info on Facebook).