Harmony, an advanced software solution, revolutionizes the way psychologists and researchers approach comparative studies, specifically between the Patient Health Questionnaire-9 (PHQ-9) and the Three Factor Eating Questionnaire (TFEQ). Straddling the domain of mental health and eating behaviours, comparing the PHQ-9 vs TFEQ can be complex and time-consuming. But with Harmony, the process becomes significantly efficient through its advanced matching mechanism and its ability to process multiple languages. PHQ-9 vs TFEQ might seem like two disparate entities; the former measures depression severity by evaluating nine parameters, while the latter gauges hunger, emotional eating, and restrained eating. However, if we dig deeper, making comparisons can provide insightful perspectives. An evident parallel, for instance, is ‘overeating’—a parameter that is ostensibly linked to both mental health and eating habits. Utilizing Harmony’s natural language processing and generative AI models can ensure an accurate and efficient harmonisation of these questionnaire items. We encourage psychologists and researchers to leverage Harmony while comparing PHQ-9 vs TFEQ. Along with the software’s comprehensive database of instruments, it also allows users to upload their own instruments in PDF formats, thereby facilitating a truly comprehensive and customizable analysis. The term ‘PHQ-9 vs TFEQ’ brings forth the promise of bringing unprecedented clarity into psychological studies, and Harmony is the tool that can help unlock these insights.