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TABLE 1

Selected Differences in Available Flash CGM Devices

FreeStyle LibreFreeStyle Libre ProFreeStyle Libre 2
FDA age approval, years ≥18 ≥18 ≥4 
Approved for nonadjunctive use (i.e., for medication dosing) Yes Yes Yes 
Approved application site Back of upper arm Back of upper arm Back of upper arm 
Blinded data No Yes No 
Possible integration with insulin pump No No Yes, via integrated CGM designation 
Wear time, days 14 14 14 
Water resistance 3 feet for 30 minutes 3 feet for 30 minutes 3 feet for 30 minutes 
Warm-up time, hours 
Calibrations/day None None None 
Frequency of glucose readings Every 1 minute (historical data storage every 15 minutes) Every 1 minute (historical data storage every 15 minutes) Every 1 minute (historical data storage every 15 minutes) 
MARD, % 9.4 12.3 Adults: 9.2; pediatrics: 9.7 
Alarms for hypoglycemia/hyperglycemia No No Yes, customizable 
FreeStyle LibreFreeStyle Libre ProFreeStyle Libre 2
FDA age approval, years ≥18 ≥18 ≥4 
Approved for nonadjunctive use (i.e., for medication dosing) Yes Yes Yes 
Approved application site Back of upper arm Back of upper arm Back of upper arm 
Blinded data No Yes No 
Possible integration with insulin pump No No Yes, via integrated CGM designation 
Wear time, days 14 14 14 
Water resistance 3 feet for 30 minutes 3 feet for 30 minutes 3 feet for 30 minutes 
Warm-up time, hours 
Calibrations/day None None None 
Frequency of glucose readings Every 1 minute (historical data storage every 15 minutes) Every 1 minute (historical data storage every 15 minutes) Every 1 minute (historical data storage every 15 minutes) 
MARD, % 9.4 12.3 Adults: 9.2; pediatrics: 9.7 
Alarms for hypoglycemia/hyperglycemia No No Yes, customizable 
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