See How They Grow: Testing the feasibility of a mobile app to support parents' understanding of child growth charts.

Background: Mobile devices provide new opportunities for the prevention of overweight and obesity in children. We aimed to co-create and test an app that offered comprehensible feedback to parents on their child's growth and delivered a suite of age-specific information about nutrition and activity.

Methods: A two-phased approach was used to co-create the digital growth tool-See How They Grow-and test its feasibility.