Not every sensor will require calibration, as both Libre CGM devices and finger-prick devices may have some degree of variation from what you would receive from a full lab draw at a physician's office. This is completely normal, and you should not be too concerned about minor discrepancies between your Libre CGM readings and your finger-prick readings.
To better understand the differences between Libre CGM and finger-prick tests, let's consider the analogy of taking a picture versus recording a video. A finger-prick test provides a snapshot of your glucose level at that specific moment, much like a still image of a person jumping only captures a single moment in time. In contrast, a Libre CGM is more like a video, taking a reading every 15 minutes and giving us a better overview of the trends in our glucose levels.
Rather than focusing on one specific value, it's important to consider the overall trends in your glucose levels. For instance, how much does your glucose increase after each meal, and how long does it take to return to pre-meal levels? By viewing these trends, you can start to identify patterns and make informed decisions about your diet and lifestyle.
If you do need to calibrate your Libre CGM device, we offer a manual calibration feature within the app. You can find more information on how to calibrate your Libre CGM in our article about Calibrating your Libre CGM. Remember that minor variations in your readings are completely normal, so focus on the overall trends and patterns rather than exact numbers.