Shopkick Is the No. 1 Most Used Shopping App in the U.S. in Terms of Engagement
According to Nielsen, Shopkick is the No. 4 shopping app in terms of reach among smartphone users in the U.S. Amazon is No. 1 with a 19 percent reach, followed by eBay with 17 percent, Groupon with 13 percent and Shopkick with 10 percent. Starbucks (8 percent), Walgreens (6 percent), Barcode Scanner (6 percent) and…