Apps are designed to enhance your experience on Facebook with engaging games and useful features. You can use apps to listen to music with friends, share what you’re reading, play games and more. Explore and add apps from the App Center to find games and social apps that fit your interests.
1. Creat new App
Login to Facebook Developers page
2. Click Create New App
Choose Name and catergory and name space (can blank)
3. Setting your App
Click Setting Tab and add your App Domains, and Contact Email (can blank field)
Click to Add Platform to add your website URL and/or some thing more if you need.
4. Click Show App Secret to get your App Secret