Two big features have been added to the Flickr app for iOS:
Automatically upload your new iPhone 5S photos to Flickr.
Automatically straighten images.
I haven’t tested this, but they claim that the photos are automatically private until you make them public. If you’ve used this feature with Dropbox, it can be a lifesaver as a backup. I would imagine the straightening feature only works on landscape images or images with long lines that are easily identified.
Via Apple Insider.