Abstract
Preschool age is a great time to learn a healthy lifestyle, for behavior therapy. Mobile health procedures are inexpensive, reliable, and accessible. This project has two phases. The KidFood mobile game and two nutrition knowledge questionnaires were designed during the first phase. In the second phase, a six-month, parallel, blinded, randomized controlled trial will perform on 120 Iranian children aged 5 to 6 years. Before and after nutritional education via KidFood, the dietary habits, the nutritional knowledge of parents and children, and the anthropometric indices of children will be evaluated.