RheumaKit for patients allows patients with rheumatic conditions to monitor their health status over time and to feed their clinician with the information they want, when and from where they want. Several conditions are covered, like rheumatoid arthritis, spondyloarthropathy, psoriatic arthritis, microcrystalline arthritis (gout), lupus (SLE), osteoarthritis, etc. The benefits for the patients are numerous: reduce the frequency of visits to the rheumatologist (in agreement with the rheumatologist), detect earlier the failure/inefficacy of an ongoing treatment, and thus earlier adpatation of the therapeutic strategy. This adds up naturally to the fact that the user has an objective idea of his/her status with respect to a rheumatic condition and its evolution over time, which in itself is a benefit. The app thus really allows to follow the "treat-to-target" trend. This mobile application can be connected to RheumaKit.com, a web platform for personalized medicine in Rheumatology to be used by the clinicians. Each clinician can store a much larger collection of information of interest regarding each patient. The types of information that can be managed by the clinicians are related to treatment, to diagnosis or to disease activity and can include biological and even genomic testing. Currently, the mobile application allows the follow-up of the user via three self-reported metrics: the simplified Health Assessment Questionaire (HAQ-DI), the Routine Assessment of Patient Index Data 3 (RAPID3), recommended by the American College of Rheumatology (ACR), and the Knee Injury and Osteoarthritis Outcome Score (KOOS). These three indices allow for the monitoring of the disease activity.