Yahoo-owned Flickr has refreshed its iPhone application this morning with a number of significant changes, most notably redesigning the user interface for easier navigation and bringing back the auto-upload feature (originally added in 2013, but subsequently removed).
The app also brings out a brand new Camera Roll section which looks a lot like the iOS Camera Roll. Coupled with one terabyte of free storage for your photo and video uploads, the new Flickr 4.0 for iOS is a worthy alternative to Apple's stock Photos + iCloud Photo Library combo.