In the iOS SDK
Powerful data, trends, and aggregated, anonymized audience insights about the people interacting with your app.
A secure and convenient way for people to log into your app or website using Facebook.
App login using just a phone number or email address — no password needed.
Get data in and out of Facebook's social graph, query data, post stories, upload photos and perform other tasks.
Understand people's actions in your app and measure the effectiveness of your Mobile App Ads.
Allow people to send invites to friends from your app.
An open standard to deep link to content in your app.