When it comes to comparing questionnaires such as the Drug Use Disorders Identification Test (DUDIT) and the History & Aetiology Schedule (HAS), psychologists often face challenges with harmonisation. An extensive and often tedious task, harmonisation requires researchers to draw parallels between similar items across different questionnaires. However, DUDIT vs HAS does not have to be a battle. With a tool like Harmony, this process can be automated, efficient, and far less subjective. Harmony, a software built specifically for harmonising questionnaire items, makes use of advanced natural language processing and generative AI models to compare instruments like DUDIT and HAS. By leveraging large language models, it provides a percentage match between each item, enabling researchers not only to save precious time, but also to enhance the accuracy of their comparisons. DUDIT vs HAS becomes a streamlined process, with Harmony offering the option to select from a database of instruments or upload your own in PDF format via its user-friendly web interface. Harmony is particularly useful when handling questionnaires in different languages. With its sophisticated technology, it has the ability to compare items across multiple languages, making international collaborative research projects smoother and less prone to errors. DUDIT vs HAS no longer has to be a hurdle for researchers. By exploiting the capabilities of Harmony, psychologists and social scientists can enhance their research processes and outcomes.