On the heels of the viral response to Popeyes' new fried chicken sandwich, a well-respected data and analytics company has released a list of restaurants that are quite literally eating Chick-fil-A's lunch on Sundays.

Analysis from Fort Worth-based Buxton Live Mobile Insights sheds light on where Chick-Fil-A customers go on Sunday when the restaurant is closed. The company tracked location data from the mobile devices of customers on Chick-fil-A properties Monday through Saturday, and then studied where those same customers ate on Sundays.

Buxton told The Dallas Morning News it "purchases and analyzes consumer location data from multiple data aggregators where the data is collected from mobile devices which have pre-opted in to location services tracking."

In Texas, Chick-fil-A's customers predictably visit Whataburger on Sundays more than any other alternative. IHOP was a go-to for many in the Midwestern states, including Oklahoma. But for most states, Cracker Barrel is the most popular alternative for customers who need their Sunday chicken fix.

Popeyes Louisiana Kitchen isn't the favorite alternative in any of the U.S. states that Buxton Live Mobile Insights collected data about — for now.

Since Chick-fil-A opened its first location in 1946, the fast-food chain has famously vowed not to serve its chicken on Sundays. The policy has been rooted in the religious values held by restaurant founder Truett Cathy.

Buxton admits studies such as this one are "fun" in nature, but said it also serves an important purpose for businesses like Chick-fil-A, which has more than 400 locations in Texas.

"Businesses can gain a much more accurate picture of where they should be investing their marketing dollars and building new premises," Buxton Senior Vice President Phillip Crow said in a statement.

Chick-fil-A's Sunday closure policy might actually contribute to the chain's successful sales, some have argued, creating a scarcity around its product and allowing employees a day to recharge. It is estimated the company leaves around $1.2 billion in annual sales on the table by being open only six days a week. And it seems content with that.

Meanwhile, Popeyes' wildly popular new chicken sandwich many have compared to Chick-fil-A's flagship sandwich has been nearly impossible to find in North Texas this week due to insane demand and 30-minute lines.