The study, entitled "2D Learning Application for Primary Students of Magalang Central Elementary School', is a learning application to support the primary students in learning Mathematics. The researchers conducted an interview locale, at Magalang Central School to identify the problems. The researchers created a learning application for Android mobile smartphones and devices using Unity and Firebase Database. The development of the study followed the Incremental methodology to complete the application. The system design on the database was made first, followed by the visual designing part. The last part is coding the application itself while making adjustments to the overall efficiency of saving and retrieving data from the database. The researchers used the updated curriculum (as of 2019) that was taken from the Department of Education for the construction of questions and lessons that will be used for the learning application. As an additional guideline in making the questions, the researchers also borrowed Math books that were used in the current year from the teachers in Magalang Central School. The researchers tested the application on the primary students of Magalang Central School then conducted a survey and used the descriptive method of treating the data. Based on the data gathered, the students of Magalang Central Elementary School enjoyed using the application while learning the topics based on their curriculum. The teachers also like the application because of its functionality and user-friendly interface. The developed system supports the learning of primary students in Mathematics. According to the results showed in the summary of findings (Table 7), the use of a game-like learning application with progress and rankings can help some students who are not interested in Math to learn more about it and gain some interest and knowledge about the subject.