Background: Individuals diagnosed with inflammatory bowel disease (IBD) encounter a myriad of limitations and challenges throughout their lives, exerting a detrimental effect on their quality of life. A significant number of these challenges can be mitigated through the utilization of a self-care application, which empowers patients to effectively manage their symptoms. The adoption of health applications is increasing. The objective of this study is to identify the data elements and functional requirements of a self-care application for IBD. Material and methods: This applied study was conducted using a descriptive approach. The research tool employed was a researcher-designed questionnaire whose validity and reliability were confirmed. The study population included general practitioners, internists, and gastroenterology specialists at Hormozgan University of Medical Sciences. A total of sixteen individuals were selected for this study. The analysis was conducted using descriptive statistics and the SPSS software. Results: Among the 101 functional requirements that were listed in the questionnaire, 91 items were approved by the physicians, 9 items required further review, and 1 item was eliminated. The items requiring further review primarily encompassed personal, medical, and health information, including the father’s name, marital status, place of residence, hazardous job categories, job type, and mobile phone number, with a score between 50 and 75%. The email field, which had a score below 50%, was removed. In the laboratory section, urinalysis scored between 50-75%, requiring further review. In the medication section, cefixime and fenugreek supplements also required further review. The remaining items were approved. Following a thorough reevaluation, it was determined that the items requiring further review had been identified. Conclusion: The functional requirements were confirmed in the form of personal information, medical and health groups, education on general disease information, nutrition, medications and strategies for reducing anxiety, medication reminders, visits and tests and colonoscopy; recording medical documents, observing normal test ranges, discussion panel, and calculating BMI. This emphasis on patient participation in their health and the use of the application indicates the need to determine the functional requirements for such patients. The determination of these requirements will increase awareness and better management of the disease.