Here's how you can download the official Facebook Camera app free for your iPhone.
Download the Official Facebook Camera App Free From iTunes
1. Go to the Facebook Camera app preview page in iTunes.
2. Click the View in iTunes button.
3. Click the Free button to download the app.
4. Sync your iPhone or iPad with iTunes to install the Facebook Camera app.
Download the Official Facebook Camera App Free From the iOS App Store
1. Open the App Store on your iPhone or iPad.
2. Search for "Facebook Camera App" (without the quotes).
3. Tap the Free button to download the app and install it on your iOS device.
Here's a description and screenshot of Facebook for iOS devices:
"With Facebook Camera, you can share photos on Facebook faster than ever, and see what friends are up to in a feed of nothing but their photos.
• Post a bunch of photos at once
• See friends’ latest photos in one place
• Play with crops and filters
• Tag friends, add captions and say where you are
• See photos from different apps"