Interstitial glucose correlates well with blood glucoseReal-time data with predictive algorithms to allow attenuation of glucose highs/lowsAlarms for high and low glucose valuesCreates ambulatory glucose profile (glycaemic variability, time in target range, etc.); supports timely treatment modifications/intensificationLong-term benefits (HbA1c and hypoglycaemia reductions) Smart phones can be used for capturing data (convenient, cost saving) Some CGM devices transmit data to insulin delivery devicesBuilds awareness of how food choices affect blood glucose. This evidence concerns the gene INS and Hypoglycemia.