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I’m a huge Costco fan and always on the lookout for great new products there. But until recently, I didn’t have the company app downloaded to my phone. I’m not alone: Costco’s chief financial officer, Richard Galanti, recently acknowledged that the company’s app-store rating was a “dismal” 2.3 stars until a series of upgrades drove it higher. By late 2023, the app was at 4.7 stars and for good…