Unlimited Photo Storage
Free with Amazon Prime
Cloud Drive offers secure online storage, automatic photo backup, and lets you access your photos anywhere: on your phone, computer, tablet, or any Fire device.
Amazon Cloud Drive Photos app is available for iOS or Android. By the way, the app is not yet optimized for iPhone 6 and iPhone 6 Plus.
Amazon Cloud Drive offers unlimited storage only for the photos. Any videos uploaded to the Cloud Drive count against the free 5 GB storage plan.