Dietary recall instruments are structured interviews that capture information on foods and beverages consumed by participants in the past 24 hours. These instruments often rely on tools to help estimate portion size such as three-dimensional food models or two-dimensional images in a booklet or on a computer screen. Two-dimensional tools are good alternatives to bulky food models but may have scale challenges. To circumvent this issue, we developed and tested a digital portion estimator tool by rendering three-dimensional digital images in a tablet using augmented reality (AR) technology. The tablet was pilot tested during 24-hour dietary recall interviews with community-dwelling, …