About Glucose Tracker, Measuring your glucose level can help you and your doctor control diabetes and its many complications. We suggest that persons with diabetes begin keeping a daily log of their glucose readings. It's agood idea to take readings at different times of day: the ideal glucose levels are: 70 to 130 mg/dL(4 to 7 mmol/L) before meals, and less than 180 mg/dL (10 mmol/L) 1 to 2 hours after a meal.