AbstractIntegrating augmented reality technology in physics education provides students with a novel learning experience requiring proficient skills and effective organization. PyLo-AR a Marker-Based Augmented Reality (M-AR) mobile app teaches atomic models (Dalton Thomson Rutherford Bohr). This study assesses PyLo-AR s user-friendliness using SUS and UEQ methods involving highschool students. SUS scores indicate a satisfactory usability level (71). UEQ averages are 1.797 (Attractiveness) 1.700 (Perspicuity) 1.577 (Efficiency) 1.605 (Dependability) 1.941 (Stimulation) and 1.067 (Novelty). The category of the stimulation indicator is excellent which means the PyLo-AR application is highly engaging for learners. The attractiveness efficiency and accuracy indicators are rated as good indicating that the PyLo-AR application is enjoyable and reliable in understanding the characteristics of each atom model through its 3D visualization features. Meanwhile the clarity and novelty indicator categories are rated as above average suggesting that the PyLo-AR application is sufficiently efficient and easy to understand with an organized User Interface (UI). Thus the PyLo-AR application has met the criteria for being a user-friendly application for learners to comprehend the characteristics of each atom model. Keywordsaugmented reality atomic model SUS UEQ