With LibreLinkUp you can allow up to 20 people to remotely track your glucose data and trends from your smartphones. The FreeStyle LibreLink app and FreeStyle Libre 14 Day reader have similar but not identical features. Fingersticks are required for treatment decisions when you see Check Blood Glucose symbol. When symptoms do not match system readings, and you suspect readings may be inaccurate, or when you experience symptoms that may be due to high or low blood glucose. When using FreeStyle LibreLink app, access to a blood glucose monitoring system is required as the app does not provide one.