You can now upload a photo to a specific Facebook album using the iOS and Android apps. There have been various methods in the past to get a, but the process is now streamlined.
iOS users will have the ability to add a photo, or photos, to an existing album or create a new album during the upload process. Android users will only be able to upload photos to an existing album. Before uploading a photo, however, Android users can create an album by visiting the Photos tab from the menu and tapping on the plus sign. It's an extra step, but with the same end result.
During the photo upload process, you will see a new album icon. Tapping on it will reveal the Facebook photo albums, allowing you to choose which album to upload the photo to. It's that simple.