While there may be a lot of crowdfunding campaigns for smartphone cases, few do what PopSlate does: It turns the back of your iPhone into an e-Reader, smartwatch and charger.

PopSlate is a charging case with a 4-in. e-ink screen that when connected to mobile apps on your iPhone, turns the rear of the smartphone into a black-and-white display for information and notifications.

With 21 days left in the Indiegogo crowdfunding campaign, the PopSlate iPhone case has already raised $575,000, seven times its original goal of $75,000.

The screen allows phone owners to use and navigate between multiple apps simultaneously; you can, for instance, configure dashboards for popular news and information feeds for at-a-glance information.

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