For psychologists and social scientists, comparing two different questionnaire items can be a daunting task, especially when they are as diverse as the Patient Health Questionnaire (PHQ-9) and the Child Behavior Questionnaire (CBQ). With Harmony, the process of harmonising these items, known as PHQ-9 vs CBQ, becomes streamlined and efficient, ensuring a more accurate comparison. Harmony is a revolutionary tool that leverages the power of generative AI and natural language processing. At the heart of this innovative tool is a capability for quick and reliable harmonisation of questionnaire items, such as those found in PHQ-9 vs CBQ, even in different languages. This tool saves researchers from the tedious and time-consuming process of manually comparing questionnaire items, enabling them to commit more time to interpreting and applying the findings. Whether you are comparing items within a study or between studies, or perhaps need to conduct a PHQ-9 vs CBQ analysis, Harmony is the tool for you. It provides a robust and user-friendly interface where you can select from a database of pre-existing instruments, or upload your own in PDF format. Considering the diversity of study populations, Harmony doesn’t limit you to English, but allows for the comparison of items in multiple languages. With the Harmony platform, harmonisation of questionnaire items, especially for PHQ-9 vs CBQ, is just a few clicks away.