Lots of cool smartphone cases, some are funny, some useful. This one is by far one of the best ones: a real E-Ink iPhone Case. It uses the same e-in display like Amazon’s Kindle. It only consumes power when the display is changed so the it used minimal battery.You can really do so many things with this case. For example you can display your boarding pass when you travel, you can have the map always on, display a to-do list, calendars, any photo you like, your kids drawing and much more. Basically you can display any useful info that you need entire day without consuming much power and not needing to wake up your phone. Oh, becasue this is a case it will of courrse also protect your phone from falls or hits.