In mainland China, students learn about oxygen production in chemistry class and conduct related experiments starting in grade 9. However, financial constraints, limited facilities, and safety concerns often hinder these experiments. Therefore, augmented reality (AR) technology offers a potential solution. In this project, the “AR Chemistry experiment” app was designed with the ADDIE model and then created with related designing and coding software to facilitate the oxygen production experiment for grade 9 students in junior high school. Fifty-one junior high school students were invited to use it to evaluate and improve the app. Their experiences were assessed through pre-tests, post-tests, questionnaires, and interviews. Results indicate mostly positive feedback, though some aspects, such as the user-friendly interface and clear instructions, need improvement. Impact and improvement are discussed based on the collected data.