This study presents a content control application usage on smartphones which can improve collaboration between children and parents. The importance of the parents' role is to provide a comprehension regarding the content of the application to children will make good communications between parents and children. So, the children can think and make decisions on something that they face. Parental control application is made to control and limit the use of applications on smartphones by children. But the existing application has a problem on the user interface. They designed just only show the same features that the application block by the parents and are not designed to involve children in the process of selecting applications. Thus, the chance of parents to help children understand the contents of the application could possibly be missed. Because the user interface is closely related to the tasks performed by users, the user interface has a role in a parental control application design. To build a good parental control application, it is necessary convenience when a user interacts with the application system. This is a consideration in this study that focused on the user interface. Design methods that will be used in designing the user interface is User Centered Design (UCD). UCD is a method in designing user interface design with a focus on what the user needs. This method will help research to provide user data that parents and children directly, so the search process more accurate data is obtained. UCD has a life cycle stage design, so the design is made to be better. The result of this research is obtained parental control application user interfaces that provide children's freedom in choosing the content of applications and needs of parents in educating children regarding the content of the application being used so parents can educate a child.