Facebook recently launched a Photo Sync feature on its iOS and Android apps. What this feature does is it automatically syncs the photos you take on your mobile device with a private album on your Facebook account. This, of course, is not an original idea considering that Google+ has had this feature since its launch.
With Facebook Photo Sync, the synced photos remain private, which means only the account owner can see them until they are chosen to be shared in a post or sent to other users. Photo Sync is not automatically active so you have to activate the feature by going to the Settings tab and selecting the option to sync.