The comparison and thorough examination of psychological questionnaires such as Patient Health Questionnaire (PHQ-9) and Geriatric Depression Scale (GDS) often present complexities due to their varying enquiries and structures. Here is where Harmony, an AI-powered tool, comes to the aid of psychologists and researchers. Harmony simplifies the process of comparing PHQ-9 vs GDS, by using natural language processing and generative AI models for accurate and efficient harmonisation. Harnessing the power of large language models, Harmony eliminates the cumbersome process of manually sifting through questionnaires. It provides a user-friendly platform where instruments like PHQ-9 and GDS can be easily uploaded and compared. The software goes even further by offering a quantitative measure - a percentage match - between each corresponding item in PHQ-9 vs GDS, thereby extending usability beyond mere comparison. The highlight of Harmony lies not just in its capabilities in comparing PHQ-9 vs GDS but also in its multi-language support and extensive database. The platform allows psychologists to effortlessly conduct comparisons both within and across studies from different languages. It ensures that insights drawn from such comparisons are not lost in translation or misinterpreted due to a lack of linguistic understanding. The combination of Harmony’s capabilities ensures that psychological studies are made more comprehensive, accurate, and efficient.