Children under 5 years are usually said in a golden age where they grow and learn very rapidly. Somehow in this age they also prone to illness and lack of nutrition which will inhibit their growth. Therefore, it is important to monitor toddler growth in their golden period to keep them healthy so that they can grow well physically and mentally. In Indonesia, toddler growth are recorded on a card called KMS which used anthropometric index to assess child nutritional status. In this research, we will built a client server KMS application. Client server architecture is used to prevent from data loss and to provide real time data. Parents can monitor children growth record through mobile application called m-KMS that has been built using PhoneGap framework. Posyandu will use web application since they have to insert many toddlers’ data every month so a wider interface will be more suitable. KMS web was developed using PHP framework. Z-score is implemented to assess toddler nutritional status. Black box testing was carried out on all functionality and showed that all features work correctly