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Kroger banner King Scoopers saw the greatest loyalty among grocery shoppers in the first half of the year, followed by Kroger's namesake stores, with Kroger's Harris Tweeter chain placing fifth, according to a report by inMarket. Giant Eagle and Fry's Food were ranked third and fourth, respectively, according to the report, which used location data from about 1,000 apps used on more than 50 million mobile devices to determine how often shoppers returned to stores.

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