CGM Showdown: Libre vs Dexcom

Dexcom Vs Libre - Prestige Medical Supply - Diabetes

Continuous glucose monitoring (CGM) devices have revolutionized diabetes management by providing real-time glucose readings and trends.

These devices help individuals with diabetes monitor their blood sugar levels more conveniently and effectively than traditional fingerstick methods.

Two popular CGM brands are Freestyle Libre and Dexcom. In this article, we will compare and contrast these two devices, exploring their features, benefits, user experiences, and more.


Managing diabetes involves constant monitoring of blood glucose levels, which is crucial for making informed decisions about medication, diet, and lifestyle.

CGM devices, such as Freestyle Libre and Dexcom, offer a continuous stream of data, eliminating the need for frequent fingerstick testing.

These devices consist of a sensor worn on the body that measures glucose levels throughout the day and transmits the data to a receiver or smartphone app.

Overview of Freestyle Libre

Freestyle Libre is a CGM system developed by Abbott. It consists of a small sensor worn on the back of the upper arm, which continuously measures interstitial fluid glucose levels.

The data can be scanned using a reader or smartphone with NFC capability. The system provides glucose readings, trends, and historical data to help users understand their glucose patterns. The sensor is disposable and needs to be replaced every 14 days.

Freestyle Libre offers several benefits to users. The device is factory calibrated, which means no fingerstick calibration is required, making it more convenient.

The system is also approved for use in children aged four and older, making it suitable for all age groups.

The reader and app provide visualizations of glucose data, including graphs and reports, helping users identify patterns and make informed decisions.

Overview of Dexcom

Dexcom is another leading manufacturer of CGM devices. The Dexcom system consists of a sensor, transmitter, and receiver or smartphone app.

The sensor is inserted just beneath the skin and measures glucose levels in the interstitial fluid. The data is transmitted wirelessly to a receiver or smartphone app, providing real-time glucose readings, trends, and alerts. The sensor is replaced every 10 days.

Dexcom offers several features that users find beneficial. The device is known for its accuracy, and many users praise its reliability in detecting hypoglycemia and hyperglycemia.

The system also includes customizable alerts, which can notify users of low or high glucose levels, helping them take prompt action. Dexcom is compatible with various smartphone operating systems and offers continuous data sharing with caregivers.

Comparison of Freestyle Libre and Dexcom

Accuracy and reliability

Both Freestyle Libre and Dexcom have shown good accuracy in clinical studies.

However, individual experiences may vary. Some users report slight differences between CGM readings and fingerstick values, but overall, both systems provide valuable insights into glucose levels and trends.

Sensor placement and wearability

Freestyle Libre's sensor is worn on the back of the upper arm and can be discreetly placed under clothing.

Dexcom's sensor is usually worn on the abdomen or upper buttocks area. Some users find the arm placement of Freestyle Libre more comfortable, while others prefer the abdomen location of Dexcom.

It ultimately comes down to personal preference.

Data display and accessibility

Freestyle Libre requires scanning the sensor with a reader or smartphone to access glucose readings. The system does not offer real-time data transmission or alerts.

Dexcom, on the other hand, provides continuous glucose data and customizable alerts directly to a receiver or smartphone app, ensuring users have access to their readings at all times.

Cost and insurance coverage

The cost of CGM systems can vary depending on factors such as insurance coverage and location.

Freestyle Libre may be more affordable for some users, especially if they don't require additional features like real-time data sharing.

Dexcom, with its advanced features and continuous data transmission, may have a higher initial cost but could offer better long-term value for users who benefit from these features.

User experiences and reviews

User feedback for Freestyle Libre has been generally positive. Many users appreciate the convenience of scanning the sensor and the accuracy of the readings.

The system's ease of use and the ability to analyze glucose trends are often praised.

Similarly, Dexcom has garnered positive reviews for its accuracy and reliability.

Users often highlight the system's continuous data sharing capabilities and customizable alerts, which provide peace of mind and support in managing their diabetes.

However, some users have experienced drawbacks with both systems. Skin irritation can occur with any CGM device, and some users have reported issues with sensor adhesion or discomfort.

It's important to note that individual experiences may vary, and what works well for one person may not be the same for another.


Both Freestyle Libre and Dexcom are reputable CGM systems that offer significant benefits for individuals with diabetes.

They provide real-time glucose readings, trends, and historical data, allowing users to make informed decisions about their diabetes management.

The choice between the two ultimately depends on personal preferences, lifestyle, and specific needs.

In conclusion, both Freestyle Libre and Dexcom have their unique features and advantages.

It's recommended that individuals consult with their healthcare providers to determine which CGM system would best suit their needs and help them achieve optimal glucose management.

Buy Freestyle Libre HERE at reduced cost

Buy Dexcom HERE at reduced cost


  1. Q: Are Freestyle Libre and Dexcom covered by insurance? A: Insurance coverage for CGM devices can vary depending on your policy. It's advisable to check with your insurance provider to determine the extent of coverage for Freestyle Libre and Dexcom.

  2. Q: Can Freestyle Libre or Dexcom be used during exercise or while swimming? A: Yes, both systems are designed to be waterproof and can be worn during various physical activities, including swimming and exercising.

  3. Q: Are Freestyle Libre and Dexcom suitable for children with diabetes? A: Yes, both systems have been approved for use in children. However, it's important to consult with a healthcare provider to determine the appropriate CGM system based on the child's specific needs.

  4. Q: Can Freestyle Libre and Dexcom be used with insulin pumps? A: Yes, both systems can be used in conjunction with insulin pumps, providing comprehensive glucose management for individuals with diabetes.

  5. Q: How often do I need to replace the sensors for Freestyle Libre and Dexcom? A: Freestyle Libre sensors need to be replaced every 14 days, while Dexcom sensors need to be replaced every 10 days to ensure accurate and reliable readings.

Ruby Ebere Ogbonna

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