Learn more about the FreeStyle Libre reader Check glucose levels anytime and anywhere With a one-second scan, you can check your glucose anytime you want. Each swipe of the reader over the sensor shows the current glucose reading, the last 8 hours of data, and a trend arrow indicating whether your glucose is rising, falling, or staying steady1. Glucose Insights With the FreeStyle Libre system, glucose levels are tracked continuously to give you patterns and trends. Get a complete 24-hour glucose snapshot, including time spent within the target range, which can help you make lifestyle changes to better manage your glucose. Scan Through Clothing Use the FreeStyle Libre system and measure glucose through clothing. Don't let routine finger pricks get in the way of your lifestyle.