This paper shows how the Mobiab system is useful for patients and which features are usually used. 18 users of the Mobiab system have been chosen. The data for this study was collected since February 2015 to February 2016. Both patients suffering from diabetes mellitus and non-diabetic users of the Mobiab system participated in the study. The results indicate that for more than a half of users is the Mobiab system convenient and used most of all functionalities of the system. One third of the users use only limited subset of functionalities - e.g. glucose and insulin monitoring.