A Behaviorally Informed Mobile App to Improve the Nutritional Quality of Grocery Shopping (SwapSHOP): Feasibility Randomized Controlled Trial.

"Conflicts of Interest: None declared."

"This study was funded by the National Institute for Health Research (NIHR) Applied Research Collaborations Oxford. SAJ, MN, and AH were funded by the NIHR Oxford Biomedical Research Centre (BRC) Obesity, Diet and Lifestyle Theme. CP, GH, and SAJ were funded by the NIHR Applied Research Collaborations Oxford. CL was funded by the Engineering and Physical Sciences Research Council and the NIHR Oxford BRC. SPR was supported by a British Heart Foundation Clinical Research Training Fellowship (FS/16/34/32211). CP is currently funded by grant RYC2020-028818-I, MCIN/AEI/10.13039/501100011033 and “ESF Investing in your future” (Ministry of Science and Innovation, Spain). The funders had no role in designing the study, data collection, analysis, interpretation of data, writing the report, or the decision to submit the manuscript for publication. The authors would like to thank Peter Scarborough and Richard Harrington for their help and support in using the FoodDB database of food products included in the SwapSHOP app. The University of Oxford is the owner of the SwapSHOP app."

"Trial Registration International Standard Randomised Controlled Trial Number ISRCTN13022312; https://doi.org/10.1186/ISRCTN13022312"