This study investigates how Internet of Things (IoT) features in a grocery store’s smartphone app affect shopping behavior. In a simulated scenario, 226 participants used the app to purchase items, such as fresh salmon. The study found that IoT services like “updated expiry date”, “Aggregated national customer experience index” and “personalized offer based on product in the basket. increased engagement with the app and encouraged more purchases. The “real-time price” IoT feature had a mixed effect on user interaction. Analysis showed that certain IoT features can be a dealbreaker in a competitive grocery market. The study is published in Journal of Retailing and Consumer Services, presented at Forskning.no and Kristiania.no.