Software In the field of psychology, comparing different questionnaires for cross-study or longitudinal analysis is a key aspect. However, matching the items of complex questionnaires like GHQ 12 and DERS manually can be painstaking and prone to errors. With the introduction of Harmony, a software that uses advanced artificial intelligence and natural language processing capabilities, this task has become much less daunting. When dealing with the GHQ 12 vs DERS comparison, researchers can utilize Harmony to seamlessly harmonise questionnaire items. Harmony provides an easier yet more effective approach to matching questionnaire items. Its large language models can compare the contents of GHQ 12 vs DERS, even delivering a percentage match between each item. This advanced software does not limit its capabilities to English alone but has the prowess to compare items in multiple languages, thus greatly widening its scope. Researchers can select instruments from Harmony’s database or even upload their own instruments in the form of PDFs to the web interface. With its robust features, Harmony presents an efficient solution to harmonise questionnaires, fostering higher consistency and accuracy in research outcomes. Whether it’s GHQ 12 vs DERS or any other combinations of questionnaires, Harmony reduces the time and effort required for harmonisation, while maximizing the potential of comparisons within and across studies. Trust Harmony to turn the usually laborious process of harmonisation into a hassle-free, user-friendly experience.