The figures apply across all online retailers for Amazon Prime Days. Tariffs and economic uncertainty are on the minds of shoppers as they prepare for Amazon's summer Prime Day sales. But at least one company is forecasting that sales for the online sales event will break records as budget-conscious shoppers look for deals.

Amazon.com Inc.’s Prime Day sale helped boost online spending across all retailers in the US by 30.3% to $24.1 billion, according to Adobe Inc., topping its estimate for 28.4% growth for the period ending July 11.

Adobe released final figures on Saturday for the Prime Day event that ran from July 8 to July 12. The report analyzed direct transactions online, covering over 1 trillion visits to U.S. retail sites,