Freestyle Libre 3 vs Freestyle Libre 2: Which is Right for You?

*Disclaimer: All content and information in this blog is for informational and educational purposes only.

This article was medically reviewed by Amanda Ciprich, MS, RD. Last updated on 1/30/24.

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Freestyle Libre 2 and Freestyle Libre 3 are two continuous glucose monitoring systems (CGMs) designed to help people with diabetes manage their blood sugar levels. Both devices, manufactured by Abbott, offer advanced technology and convenience in glucose monitoring, yet they differ in several aspects that could significantly impact a user's experience and overall effectiveness in diabetes management. To determine which option aligns best with your needs, we will highlight the features and functionality each system offers so you can select the best option for your diabetes care.

Key features and benefits of Freestyle Libre 2

The Freestyle Libre 2 continues to be a trusted and favored option among people with diabetes that includes key features and benefits, such as:

Elimination of fingersticks: Fingersticks are not required unless symptoms do not match glucose readings.
Improved glycemic management: By wearing a Freestyle Libre 2, users have experienced reduced A1C levels and reduced hypoglycemic episodes .
Real-time alerts: Users have the option to be alerted for high and low blood sugar levels without scanning. This can help users make informed treatment decisions and reduce the amount of time glucose levels spend above or below range.
Convenience: Freestyle Libre 2 is compatible with a number of smartphone devices. Users can easily access glucose readings via a compatible smartphone device which eliminates the need to carry a separate reader.

Key features and improvements of Freestyle Libre 3

The Freestyle Libre 3 brings several key features and improvements to the table.

Elimination of fingersticks: Freestyle Libre 3 does not require fingersticks unless symptoms do not match glucose readings.
Superior accuracy: Compared to other 14-day CGM systems, Freestyle Libre 3 is currently the most accurate CGM sensor available.
Discreet design: Freestyle Libre 3 is 70% smaller than previous generations making it the smallest and thinnest sensor. The smaller size also has a positive environmental impact with a 41% reduction in plastic use and 43% decrease in carton paper. —smallest and thinnest CGM sensor available
Real-time alerts: Users have the option to be alerted for high and low blood sugar levels without scanning. This can help users make informed treatment decisions and reduce the amount of time glucose levels spend above or below range.

Comparison of accuracy and performance between Freestyle Libre 2 and Freestyle Libre 3

Both the Freestyle Libre 2 and Freestyle Libre 3 stand out as CGM systems that are known for their precision and efficacy in monitoring glucose levels. The Mean Absolute Relative Difference (MARD) serves as a widely utilized metric for CGM accuracy, where a lower value indicates greater accuracy. According to an Abbott news release, the FreeStyle Libre 3 system has a MARD of 7.9 percent. This is the first CGM to demonstrate a sub-8% value, making it the most accurate 14-day CGM. In comparison, the FreeStyle Libre 2 registers a MARD of 9.2 percent, positioning the newer CGM system as the superior choice for individuals seeking the most precise glucose readings available.

Cost Comparison: Freestyle Libre 2 vs Freestyle Libre 3

Freestyle Libre 2 and Freestyle Libre 3 have different pricing structures, and it's important to evaluate which option aligns with your budget and insurance coverage. Due to its advanced features and improvements, the Freestyle Libre 3 typically has a higher list price than the Freestyle Libre 2. However, it's worth noting that out-of-pocket costs may vary depending on your specific health insurance plan coverage. It's advisable to check with your healthcare provider or insurance company to evaluate which system is most cost effective.

User experience and comfort: Freestyle Libre 2 vs Freestyle Libre 3

Both Freestyle Libre 2 and Freestyle Libre 3 prioritize user experience and comfort in their continuous glucose monitoring systems, along with some distinctions.

Freestyle Libre 2 enhances user experience by introducing optional real-time alarms for high and low glucose levels, providing added peace of mind and convenience for individuals managing diabetes. However, users still need to perform regular scans to obtain real-time glucose readings, which might affect the convenience factor.

Freestyle Libre 3 significantly enhances user comfort by eliminating the need for routine scanning altogether. This innovation ensures a seamless experience with continuous glucose data updates every minute, transmitted to a compatible smartphone or reader.

Both systems offer extended wear durations of up to 14 days, contributing to overall user comfort by minimizing the frequency of sensor changes.

Compatibility of Freestyle Libre 2 and Freestyle Libre 3

Both Freestyle Libre 2 and Freestyle Libre 3 are designed to offer compatibility with various devices, providing users with flexible options for accessing their glucose data. Both devices allow users to choose between utilizing a compatible smartphone device or separate handheld reader to access glucose readings. Both systems cater to users' preferences, whether they prefer using a separate dedicated reader or using their smartphone device for accessing their glucose data. Users have flexibility to select their preferred method to receive glucose data.

Choosing the right option: Factors to consider when deciding between Freestyle Libre 2 and Freestyle Libre 3

When deciding between Freestyle Libre 2 and Freestyle Libre 3, there are several factors to consider:

1. Accuracy

If highly accurate glucose readings are crucial for your diabetes management, the Freestyle Libre 3's lower MARD may be a significant advantage.

2. Budget

Evaluate the long-term costs associated with each system and determine which option best fits your financial budget.

3. Features

Consider the specific features important to you, such as alarms for low and high glucose levels, compatibility with smartphones, or the ability to sync data with other devices.

4. Comfort

Think about your preference for sensor size and the importance of having a discreet and comfortable wearing experience.

5. Compatibility

If you’d like to utilize your smartphone as your preferred scanning device, you may want to consider whether it is compatible with either Freestyle Libre 2 or Freestyle Libre 3.

Frequently asked questions about Freestyle Libre 3 and Freestyle Libre 2

1. Can I swim or shower with the Freestyle Libre 3 or Freestyle Libre 2?

Freestyle Libre 3 and Freestyle Libre 2 are water-resistant, allowing you to swim and shower while wearing the sensor. However, the sensors should not be submerged in water deeper than 3 feet or kept underwater for longer than 30 minutes at a time. It is important to note that the sensor readers are not waterproof and should not be used when swimming or bathing.

2. Can I use Freestyle Libre 3 or Freestyle Libre 2 during exercise?

Yes, both systems are designed to be worn during exercise. They provide continuous glucose monitoring, allowing you to monitor your glucose levels and make necessary adjustments to your diabetes management during physical activity.

3. How long can I wear the Freestyle Libre 3 or Freestyle Libre 2 sensor?

The wear time for both systems is 14 days. After this period, the sensor should be replaced with a new one to ensure accurate glucose readings.

Making an informed decision

The Freestyle Libre 3 and Freestyle Libre 2 offer advanced features and benefits for individuals with diabetes. The Freestyle Libre 3's smaller size, enhanced accuracy, and optional alarms make it an appealing choice for those seeking the latest technology and improved user experience. On the other hand, the Freestyle Libre 2 provides reliable real-time glucose readings, smartphone compatibility, and optional alarms at a potentially more affordable price point.

When deciding between the Freestyle Libre 3 and Freestyle Libre 2, it's important to consider factors such as accuracy, cost, features, comfort, availability, and compatibility. By carefully evaluating these aspects and consulting with your healthcare provider, you can make a well-informed decision that best suits your diabetes management needs. Remember, both systems offer valuable insights into your blood sugar control, helping you live a healthier, more manageable life with diabetes.

About Amanda Ciprich, MS, RD

Amanda Ciprich, a registered dietitian with a specialization in type 1 diabetes, was diagnosed with T1D herself at the age of 18. With her expertise and personal experience, she has authored two books, including "The Caregiver's Guide to Diabetes: Practical Advice for Caring for Your Loved One." As the founder of T1D Nutritionist, a virtual insurance-based private practice, Amanda provides counseling and guidance to individuals with T1D and their families, supporting them in effectively managing diabetes.