AdvertisementWhy Indie Brands Are At War With Shein And Other Fast-Fashion CompaniesJuly 20, 2021Sharon Pruitt-YoungfacebookEmailA Shein app, here in a photo illustration, in the IOS App Store in Bargteheide, Germany. Shein has become the most-installed shopping app in America. (Katja Knupper/Die Fotowerft/DeFodi Images via Getty Images)