In the past few months, we have covered plenty of portable printers for mobile devices. The Prynt Case for iPhone 6s is another device that lets you print photos conveniently. Just attach your smartphone to your case and you are ready to print photos. Prynt also saves a video inside each photo, allowing you to see it using the Prynt app.
Prynt does not require ink cartridges to work. It is available for Android devices as well. The above video gives you a quick look at Prynt.[Source]