In the field of psychology research, comparing and harmonising questionnaire items is integral. One such comparison that poses a certain complexity is between the Patient Health Questionnaire (PHQ-9) and the Young Adult Self Report (YASR). PHQ-9 vs YASR comparison involves the intricate task of harmonising the items related to mental disorders and antisocial personal problems respectively. However, with manual methods, such comparisons could prove to be highly time-consuming and prone to subjectivity. Harmony comes to the rescue in this scenario, enabling researchers to perform PHQ-9 vs YASR comparisons with ease and efficiency. Not only does it support harmonising cross-language instruments, but it also has the capability to accept instruments in PDF format uploaded onto its web interface. Harmony employs natural language processing and advanced generative AI models to provide percentage matches between individual questionnaire items, thus significantly easing the process of comparing PHQ-9 and YASR. The intuitive, simplicity-meets-power characteristic of Harmony makes it an indispensable tool in comparative and longitudinal psychology research. The use of sophisticated language models empowers it to provide valuable insights by revealing critical correlations between different studies and social conditions. Clearly, Harmony is revolutionizing the way PHQ-9 vs YASR comparison is carried out, opening new avenues for enhanced understanding of mental and antisocial disorders.