Smartphones dominate online shopping device preferences across most age groups in the United States, with the most used device for online shopping by age group in USA 2026 data showing peak adoption among 25–34 year olds at . Younger adults overwhelmingly favor mobile commerce, with 18–24 year olds close behind at and usage remaining strong through the 35–44 group at . The generational contrast is stark: among adults 65 and older, only rely primarily on a smartphone for online purchases.