Glucometers are good for glucose testing and have used them for years. But a true game changer is a continuous glucose meter (CGM). With a CGM you look at a display (a separate display device or smartphone) and get glucose readings every 5 minutes. Now you know how the foods and drinks you consume affects blood glucose in real time. Also how long some foods can cause high glucose readings 4-6 hours have eating them. First day on a CGM I stopped having fruit juice for breakfast. And from the reports you get you have a good idea when and how food and exercise affect your levels. Also a huge resource for your doctor. It can be a life saver, especially at night, when sleeping and you may be unaware you are going low. Alarms can be set for lows and highs so you can treat them before they get out of hand. I'm 74 and type 1 since 1970. Insulin pump made the biggest improvement but with the CGM it is on a whole new level now. IMHO