Freestyle Libre 3
Medtronic Simplera Sync
Summary
The FreeStyle Libre 3 is the smallest, thinnest, all-in-one glucose sensor/transmitter CGM and lasts 14 days. This sensor sends minute-by-minute glucose readings to a compatible smartphone app and only needs fingersticks as backup. Optional low and high blood sugar notifications are available for this system.
FDA approved for insertion on the back of the upper arm (ages 4 years and older).
MARD of 7.9%.
This is a disposable, all-in-one CGM sensor integrated with Medtronic’s pump systems (e.g., MiniMed 780G). Typical wear time is 6 days, plus a 24-hour “grace period.” No routine fingersticks are required when the device is in closed-loop/SmartGuard mode.
FDA approved for ages 7+ on the back of the upper arm
MARD of ~9%
Components
Sensor
Sensor uses a thin, flexible filament inserted just under the skin to measure glucose levels every minute. Push-button applicator allows sensor to be placed on the body in one step.
Receiver
Conveniently access glucose readings using a reader, smartphone, or both. Available for both iOS and Android devices.
Sensor
Sensor uses a thin, flexible filament beneath the skin to continuously measure glucose every 5 minutes. Simple, one-step applicator makes insertion fast and easy.
Device Details
Overview
Smallest, thinnest, all-in-one glucose sensor/transmitter with low and high blood glucose alarms can be worn on the upper arm.
Disposable, all-in-one CGM sensor integrated with Medtronic’s pump systems
Affordability and Access
$$$$
Widely covered. Provided by pharmacies. Price range; $0-$100/month. Often the cheapest and easier to access sensor.
$$$$
Coverage depends on region and insurance; supplied via DME or specialty pharmacy.
Data Monitoring Options
Yes
Sensor automatically sends data to the user’s LibreView account which enables sharing with HCPs and caregivers.
Yes
Data streams directly to the pump; users and clinicians can view trends and logs via Medtronic’s platforms.
Data View Options
Yes
Freestyle Libre 3 app or Libre by Abbott provides glucose readings and alarms, multiple data views, the ability to share glucose data and real-time alarms with LibreLinkUp, and the ability to connect to a clinician's practice through LibreView.
Yes
Data view directly on your connected pump or smart device.
Duration and Storage
14 Days
Sensors last 14 days and work between 50ºF - 113ºF. They are shipped in orders of 1-3 months at a time - which is 2-6 boxes at a time.
6 Days
Sensors last 6 days, with a 24-hour grace period, and need about 2 hours to warm up. They work between 41°F – 104°F and should be stored between 36°F – 86°F. They are usually shipped in 1–3 month supplies, which is about 5–15 sensors at a time.
Vision / Auditory / Dexterity
NO text to speech
YES vibration alerts
A LOT of dexterity needed
YES text to speech
YES vibration alerts
Multiple sound sources
Moderate dexterity needed
Patient Considerations
Active Lifestyle
Water-resistant for up to 3 feet deep for 30 minutes and light on the body, does not get in the way of activity.
Compact and integrated. Reducing bulk; compatibility with daily activities depends on the adhesive and body movement. Water-resistant up to 8 feet (2.4 m) for 30 minutes.
Avoiding Highs and Lows
Optional glucose alerts for low and high glucose levels. Trend arrows show the direction glucose is heading, with the rate of change.
SmartGuard closed-loop. Pump adjustments use sensor data continuously to reduce highs and lows.
Comfort
Lowest profile sensor and smallest adhesive (about the size of two stacked U.S pennies).
Low profile. No overtape needed and one-hand insertion.
Easy Insulin Dosing
Sensor trends can be used for dose adjustment.
SmartGuard technology. When paired with the MiniMed 780G, it automatically adjusts basal and gives correction boluses based on sensor readings. In manual mode, glucose values can guide dosing decisions, but fingersticks are required for confirmation.
Easy to Use
No scanning required. Minute-by-minute readings are sent directly to the mobile app.
All-in-one. Eliminates the need for a separate transmitter, simplifying sensor changes (although more frequent due to the 6-day wear).
Fewer Fingersticks
Factory-calibrated sensor. Finger-sticks needed for backup only.
Calibration is optional. Perfect if you like having that choice.
Privacy
Hypoglycemia safety alarm. Discreet size but built-in hypoglycemia safety alarm alerts users when glucose is below 55 mg/dl and is always on.
Small and integrated, but visible on the back of the arm. No separate transmitter reduces the number of visible parts. Alerts and alarms can be adjusted for discretion.