The popSlate case essentially behaves in the same manner as the YotaPhone 2’s rear display, in that the 4-inch E Ink screen mirrors your main screen and is always on. You can use it to check your notifications and reply to messages, for example, if your iPhone is low on battery. In addition, because it’s always-on, you can display static images, such as boarding passes and movie tickets. It’s also great for those who love to read ebooks.
Through the popSlate app, you can take pictures while using the E Ink display as your viewfinder. You can also browse through images to display them while you’re not using the E Ink screen, which should last you a week on a single charge. Thankfully, there’s no proprietary charging cable to be found, as the popSlate case can be charged with a Micro USB.
You can grab the popSlate case for your iPhone 5, 5S, and 6, but it will set you back $130. In addition, because initial stock is sold out, prospective buyers will have to wait until February for delivery.