The Freestyle Libre 2 and Freestyle Libre 3 are two popular options in the world of glucose monitoring systems. While both devices serve the same purpose of monitoring glucose levels, they have distinct differences that set them apart. Understanding these differences can help individuals choose the device that best suits their needs.
Key Takeaways:
- The Freestyle Libre 2 and Freestyle Libre 3 are continuous glucose monitoring systems.
- Freestyle Libre 2 requires scanning every 8 hours, whereas Freestyle Libre 3 provides real-time glucose readings.
- Freestyle Libre 3 has a longer transmission distance and is already compatible with closed loop systems in Europe.
- Freestyle Libre 2 is worn on the back of the arm, while Freestyle Libre 3 is the smallest stand-alone CGM on the market.
- Both devices have different accuracy levels and pricing options.
Features of Freestyle Libre 2
The Freestyle Libre 2 offers a range of features that make it a reliable choice for continuous glucose monitoring. This small circular device weighs only 0.18 ounces and has a diameter of 1.38 inches, making it lightweight and discreet when worn on the back of the arm. The sensor has a lifespan of 14 days, eliminating the need for frequent replacements.
To scan the sensor, you can choose between the Freestyle Libre 2 reader or a compatible smartphone with the Freestyle LibreLink or Libre 2 app. This flexibility allows users to conveniently access their glucose readings anytime, anywhere. The companion app provides valuable data, including time in range, average glucose levels, and estimated A1c, giving users a comprehensive overview of their glucose management.
One notable feature of the Freestyle Libre 2 is its water resistance. The sensor can be worn underwater up to a depth of 3.2 feet for 30 minutes, ensuring that users can continue to monitor their glucose levels even during activities like swimming or showering.
Specifications
| Weight | Diameter | Sensor Lifespan | Scanning Options | Water Resistance |
|---|---|---|---|---|
| 0.18 oz | 1.38 inches | 14 days | Freestyle Libre 2 reader or compatible smartphone | Up to 3.2 feet for 30 minutes |
Features of Freestyle Libre 3
The Freestyle Libre 3 is the epitome of convenience when it comes to continuous glucose monitoring. With its compact size and impressive transmission distance, it offers a seamless experience for users. Weighing just 0.035 ounces and measuring 0.83 inches in diameter, the Freestyle Libre 3 is the smallest stand-alone CGM available. Its lightweight design ensures minimal intrusion, allowing for greater comfort and freedom of movement.
One of the standout features of the Freestyle Libre 3 is its real-time glucose readings. Unlike the Freestyle Libre 2, which requires scanning, the Freestyle Libre 3 automatically transmits glucose data to a compatible smartphone via Bluetooth. This eliminates the need for manual scans and provides users with instant access to their glucose levels. The Freestyle Libre 3 is already compatible with closed loop systems in certain countries, paving the way for enhanced integration with insulin pumps in the US.
Another notable aspect of the Freestyle Libre 3 is its extended sensor lifespan. Lasting for 14 days, this sensor ensures a continuous and uninterrupted monitoring experience. With a warm-up period of 60 minutes, users can quickly get started and enjoy the benefits of real-time glucose readings throughout the entire lifespan of the sensor. The Freestyle Libre 3 is a testament to the advancements in technology, offering improved convenience and accuracy for individuals managing their glucose levels.
| Features | Freestyle Libre 3 |
|---|---|
| Size | 0.83 inches in diameter |
| Weight | 0.035 ounces |
| Transmission Distance | 33 feet |
| Lifespan | 14 days |
| Warm-up Period | 60 minutes |
| Scanning Requirement | No |
| Compatibility | Closed loop systems (certain countries), Insulin pumps (US – future integration) |
Performance Comparison
When comparing the performance of the Freestyle Libre 2 and Freestyle Libre 3 continuous glucose monitoring systems, accuracy is an important factor to consider. Both systems provide valuable data to help individuals manage their glucose levels effectively, but there are slight differences in their performance.
The Freestyle Libre 2 has a mean absolute relative difference (MARD) of 9.3%. This means that there may be a difference of up to 9.3% between the CGM readings and laboratory blood glucose measurements. It’s important to note that users may experience differences of over 20% in certain situations, especially when glucose levels are low. However, the Freestyle Libre 2 still provides reliable and consistent results for the majority of users.
On the other hand, the Freestyle Libre 3 offers a greater level of accuracy with a lower MARD of 7.6%. This means that the difference between CGM readings and laboratory blood glucose measurements is generally smaller compared to the Freestyle Libre 2. However, it’s worth noting that inaccurate results can still occur, particularly when capillary blood glucose readings are between 90 and 220 mg/dL. It’s important for users to be aware of these factors and consult with their healthcare professionals for proper interpretation and decision-making based on CGM data.
It’s important to remember that no CGM on the market provides 100% reliable results. Factors such as individual physiology, sensor placement, and interstitial fluid lag can contribute to variations in readings. However, both the Freestyle Libre 2 and Freestyle Libre 3 offer valuable insights into glucose levels, allowing users to make informed decisions about their diabetes management.
Table: Performance Comparison
| CGM System | Mean Absolute Relative Difference (MARD) |
|---|---|
| Freestyle Libre 2 | 9.3% |
| Freestyle Libre 3 | 7.6% |
Price & Monthly Cost
When considering the purchase of a continuous glucose monitoring system (CGM), it’s important to understand the price and monthly cost associated with each device. The Freestyle Libre 2 and Freestyle Libre 3 sensors are available for purchase without a prescription, offering convenience and accessibility to users.
The Freestyle Libre 2 pack of 2 sensors is priced at around $170, making it an affordable option for many. On the other hand, the Freestyle Libre 3 pack of 2 sensors is slightly cheaper at around $150, providing cost savings for those looking to minimize expenses.
It’s worth noting that the monthly cost for commercially insured type 1 diabetics using these sensors can range from $0 to $75, depending on insurance coverage and eligibility for patient assistance programs. By considering these factors, individuals can make informed decisions based on their financial situation and healthcare needs.
| Freestyle Libre 2 | Freestyle Libre 3 | |
|---|---|---|
| Sensor Price | $170 for pack of 2 sensors | $150 for pack of 2 sensors |
| Monthly Cost | Varies from $0 to $75 | Varies from $0 to $75 |
It’s essential to keep in mind that while the initial price and monthly cost are important factors to consider, the overall benefits and features of the CGM should also be taken into account. Each device has its own unique capabilities and advantages, ensuring users have options that best fit their lifestyle and diabetes management needs.
In conclusion, understanding the price and monthly cost associated with the Freestyle Libre 2 and Freestyle Libre 3 CGMs is crucial for individuals exploring their options for continuous glucose monitoring. By weighing the financial implications alongside the features and benefits provided by each device, users can make informed decisions to effectively manage their diabetes and improve their quality of life.
Conclusion
In conclusion, the Freestyle Libre 2 and Freestyle Libre 3 are two excellent options for continuous glucose monitoring. They have their own unique features and specifications, allowing users to choose the device that best suits their needs.
The Freestyle Libre 2 provides a straightforward and user-friendly experience. With the option to use either a reader or smartphone for scanning, it offers convenience and flexibility. The companion app provides various data, such as time in range, average glucose levels, and estimated A1c. Users can trust its accuracy for monitoring glucose levels effectively.
On the other hand, the Freestyle Libre 3 offers added convenience with its smaller size and longer transmission distance. With real-time glucose readings transmitted directly to a compatible smartphone, there’s no need for scanning. It is already compatible with closed loop systems and is expected to integrate with insulin pumps in the US, making it a promising choice for those who require advanced integration.
In summary, the decision between the Freestyle Libre 2 and Freestyle Libre 3 depends on individual preferences and needs. Both devices provide reliable and accurate glucose monitoring, but the Freestyle Libre 3 offers additional convenience and compatibility with advanced systems. Consider your priorities and choose the device that fits your lifestyle and diabetes management goals.
FAQ
What is the difference between Freestyle Libre 2 and Freestyle Libre 3?
The main difference between Freestyle Libre 2 and Freestyle Libre 3 is that the Freestyle Libre 3 is smaller in size, has a longer transmission distance, and provides real-time glucose readings without scanning. It is also already compatible with closed loop systems in certain countries and is expected to integrate with insulin pumps in the US in the future.
What are the features of Freestyle Libre 2?
Freestyle Libre 2 is a small circular device worn on the back of the arm. It has a sensor lifespan of 14 days and does not require calibration. The sensor has a warm-up period of 60 minutes and needs to be scanned every 8 hours for a complete daily curve. It can be used with the Freestyle Libre 2 reader or a compatible smartphone with the Freestyle LibreLink or Libre 2 app. The app provides various data, including time in range, average glucose levels, and estimated A1c. The sensor can also be worn underwater up to a depth of 3.2 feet for 30 minutes.
What are the features of Freestyle Libre 3?
Freestyle Libre 3 is the smallest stand-alone continuous glucose monitoring device on the market. It weighs just 0.035 ounces and has a diameter of 0.83 inches. The sensor lasts for 14 days and requires a warm-up period of 60 minutes. Unlike Freestyle Libre 2, it does not require scanning and provides real-time glucose readings to a compatible smartphone through Bluetooth. It also has a longer transmission distance of 33 feet and is already compatible with closed loop systems in certain countries.
How do the performance and accuracy of Freestyle Libre 2 and Freestyle Libre 3 compare?
Freestyle Libre 2 has a mean absolute relative difference (MARD) of 9.3%, meaning there may be a difference of up to 9.3% between CGM readings and laboratory blood glucose measurements. Users may experience differences of over 20% in certain situations, especially when glucose levels are low. On the other hand, Freestyle Libre 3 has a lower MARD of 7.6%, making it more accurate. However, both devices can still provide inaccurate results, particularly when capillary blood glucose readings are between 90 and 220 mg/dL.
What is the price and monthly cost of Freestyle Libre 2 and Freestyle Libre 3?
The Freestyle Libre 2 pack of 2 sensors costs around $170, while the Freestyle Libre 3 pack of 2 sensors is slightly cheaper at around $150. The monthly cost for commercially insured type 1 diabetics using these sensors ranges from $0 to $75. Prices may vary depending on insurance coverage and eligibility for patient assistance programs.
