A simple-to-use inflammatory bowel disease stool test that enables individuals with Crohn’s disease or ulcerative colitis to monitor their disease activity at home. Patients can use the quantitative faecal calprotectin test at home or anywhere else with minimum preparation or disruption. This in vitro bowel inflammation test measures calprotectin using gold-conjugated anti-calprotectin antibodies in a lateral flow test in conjunction with a smartphone app which quantifies and reports the result so that patients and providers can evaluate the effectiveness of treatment controlling the disease. The app scans and analyses the faecal calprotectin test result according to the intensity of the control and test lines on the lateral flow test. The quantitative results of the test are then sent automatically to the online portal for the patient’s clinical team to monitor remotely.