Introduction: Children's health efforts can be carried out as early as possible to find out developmental deviations in children while maintaining and improving children's quality of life optimally, physically, mentally, emotionally, socially and intelligence that has the potential to be developed. The quality of child development is a determinant of the child's further development. The slightest deviation in child development must be immediately detected and handled in order to develop optimally. The Golden Period is a very important period and a short period of time because it cannot be repeated. The Golden Period is the first 5 years of a child's life which is very sensitive to the environment. Materials and methods: This research method is carried out in several stages. The initial stage is by analyzing the initial product to be developed, this research will develop and design the KMPE REV.01 Mobile which consists of plotting, application features, input of history data, data coding, results of detection of deviations in children's emotional behavior and basic problem-solving solutions then the product developed will be validated by experts & revised, small-scale field trials. Small-scale research data collection method using primary data. The next stage will be testing the effectiveness.