When McDonald's discontinues menu items—like crispy Chicken Selects and the extremely well loved McWrap—fans can get pretty outraged. I mean, what is a fast food spot without your tried-and-true order? Thankfully, Golden Arches is finally bringing back one of its most popular menu items of all time: the McRib.

You can get your hands on the cult favorite pork patty served on a homestyle roll with the iconic McRib barbecue sauce, pickles, and onions. There is a catch, though.

The sandwich, which is returning for a limited time, will only be available at specific locations for about $4. But before you start calling every McD's in a 20-mile radius, you can download the brand's McRib Finder from Apple's App Store.

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It works like an iMessage texting service, and it allows you to find participating restaurants and invite friends to a particular location that serves the McRib. Unfortunately Android users are out of luck—at least until McDonald's creates a non-iPhone version of its McRib-locating service.

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