Looking to get an iPhone 6 or 6 Plus but aren’t sure if your local Apple Store will have the exact model you want? No problem — you can just go to the brilliant website iStockNow, which keeps track of Apple Store inventory for all iPhone 6 and iPhone 6 Plus models in real time.

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What makes this website terrific is its simple layout — it’s a map of the U.S. with tags of every single Apple Store. A green tag means that the store has devices in stock while a red tag means it’s completely out of everything.

Clicking on the green tag will then drill down information for you further by breaking down which iPhones are available by the carrier they’re on, their storage size and their color. At the Apple flagship store in Boston, for example, there are tons of different models available in multiple colors and storage sizes for AT&T subscribers but Verizon subscribers are stuck with 64GB and 128GB silver models of the iPhone 6 Plus. The flagship Apple Store in San Francisco, meanwhile, is loaded with different iPhone models for Verizon and Sprint customers but is almost completely out of models that run on AT&T’s network.

Check out the full website yourself by clicking the source link below.