The iPhone's Ad-Blocking Apps Are Stirring Up Trouble For Online Retailers

Crystal, a popular ad-blocking app for the iPhone, is allegedly obstructing images and text on retail sites like Sears.com.

Since the release of iOS 9, which supports ad blockers, a number of apps that obstruct ads have made their way into the App Store. The use of these apps on iPhones, in particular, appears to be compromising the mobile sites of retailers like Walmart and Sears—and could potentially hinder online sales in the coming months.

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