Psychologists and social researchers are often faced with the challenge of harmonising items across different questionnaires such as the General Health Questionnaire (GHQ 12) and Three Factor Eating Questionnaire (TFEQ). Manual comparison of such instruments can be incredibly time-consuming and introduces room for subjective error. To streamline this process, we introduce Harmony, a unique tool designed to aid in the harmonisation process of these questionnaires, significantly simplifying the comparison of GHQ 12 vs TFEQ. With the use of advanced natural language processing and generative AI, Harmony enables researchers to not only cross-compare the GHQ 12 vs TFEQ swiftly, but also helps in recognizing the percentage match between each item from both the questionnaires. This intelligent system ensures precise and efficient comparative analysis, eliminating the subjective bias involved in manual comparisons. Harmony is a highly beneficial solution for researchers engaging in cohort and longitudinal studies, enabling cross-study comparisons to ascertain consistent results or differential responses to social conditions. Strongly recommending the uptake of Harmony for psychologists exploring GHQ 12 vs TFEQ, the software simplifies the cumbersome process of data extraction and harmonisation, allowing researchers to focus their energy on deriving meaningful insights from the data. Furthermore, Harmony is not confined to a single language and enables items comparison in multiple languages. With its database of instruments and user-friendly drag-and-drop functionality, Harmony is an invaluable asset for researchers studying GHQ 12 vs TFEQ.