Diabetes is a metabolic disease that is manifested by an uncontrolled level of glucose in the blood due to the inability to produce an adequate amount of insulin in the body. Depending on the cause, there are several types of diabetes, and the most well-known forms are type 1 diabetes as an autoimmune disease and type 2 diabetes, the so-called senile diabetes. In order to ensure a better quality of life with this disease, it is necessary to take the appropriate amount of insulin, regulate the level of glucose in the blood and engage in physical activity. There are various glucose monitoring devices, from standard (SMBG) devices that measure the glucose level from a drop of blood, which is applied to a test strip and inserted into the device, to the increasingly used continuous devices (CGM) that control glucose with the help of a sensor with a cannula that is placed under the skin in the intercellular fluid. Furthermore, the new technology enables connecting sensors to mobile devices (mobile phones, tablets) and continous monitoring glucose levels using associated software. Also, the intake of insulin in the body was made easier. In the past, only doctors injected insulin, but now diabetics can inject themselves with insulin using simple syringes or an insulin pump. Insulin pumps can additionally be connected to a mobile device and a glucose sensor, forming a closed loop blood glucose regulation system. The industry strives to develop devices and aids that will replace the functions of a diseased pancreas. In the near future, it is expected that catheter-free pumps and even once-weekly insulins will flood the market, which will further facilitate diabetes management and improve the quality of life of diabetics.