Best 3 Blood Glucose Monitoring Devices in the UK (2026)
When selecting a glucose monitor, prioritise accuracy, ease of use, and essential features. Consider your budget, device compatibility, insurance coverage, and healthcare provider's recommendations. Utilise trial periods, read user reviews, and choose a reputable brand for quality and reliability.
Abbott Freestyle Libre:
Abbott is a leading provider of glucose monitoring systems, offering affordable and innovative solutions for people with diabetes. There are two versions of the Freestyle Libre available in the UK: FreeStyle Libre 2 Plus and FreeStyle Libre 3 Plus.
And
Dexcom:
Ashcroft Pharmacy offers CGM systems from both Abbott and Dexcom, including FreeStyle Libre 2 Plus, FreeStyle Libre 3 Plus, and Dexcom ONE+.
Quick Comparison
FreeStyle Libre 2 Plus
The FreeStyle Libre 2 Plus is the 2nd generation of the two versions and is still a popular choice for people with diabetes aged 2 and older. It is worn for 15 days and does not require calibration.
It has optional high and low glucose alerts and can share data with healthcare professionals and caregivers via the LibreLinkUp app.
✅ Key Features
- 15-day sensor (longer than the previous 14-day version)
- Real-time glucose readings to a smartphone
- Optional high/low glucose alarms
- Works with the LibreLink app and the reader
- Suitable for ages 2+
✅ Accuracy
- Clinically reliable and widely used in NHS pathways
✅ Ease of Use
- Simple to apply and use
- Still supports manual scanning, although real-time data is available
Cost & Availability
- Available on the NHS for eligible patients
- Can also be self-funded
⚠️ Important Update
- The original Libre 2 has been phased out in the UK (2025) and replaced by Libre 2 Plus
Best For
- People who want a trusted, widely supported CGM
- Those already using Libre systems
FreeStyle Libre 3 Plus Sensor
The Freestyle Libre 3 Plus Sensor has the most advanced technology from all the Libre systems currently available in the UK. It is the smallest, most discreet sensor which is worn on the back of the upper arm. It continuously measures blood glucose concentrations in the body's interstitial fluid during the day and night.
The sensor updates the glucose result up to every minute and sends it straight to your compatible smartphone — without the need for any finger pricks.
It can be worn for up to 15 days and is water-resistant, so it continues to work while you shower, swim or exercise.
✅ Key Features
- Fully real-time glucose readings every minute
- No scanning required
- 15-day wear time
- Optional glucose alarms
- Ultra-small, discreet sensor
- Compatible with automated insulin delivery (closed-loop systems)
✅ Accuracy
- Around 9.2% MARD, indicating high clinical accuracy
✅ Ease of Use
- Fully automatic—just wear and monitor
- No reader required (smartphone-based)
Cost & Availability
- Being rolled out on the NHS (eligibility required)
- Not widely available for open retail purchase
⚠️ Important Update
Libre 3 is being phased out and replaced by Libre 3 Plus (by 2026)
Best For
- People who want hands-off, continuous monitoring
- Users needing integration with insulin pumps
Dexcom ONE+
The Dexcom ONE+ is a continuous glucose monitoring system designed to deliver real-time glucose readings every 5 minutes directly to a compatible smartphone or receiver. This is also a popular choice for people with diabetes because it offers several advantages over other systems.
✅ Key Features
- Automatic glucose readings every 5 minutes
- No scanning or finger pricks required
- Customisable alerts for highs and lows
- Smartphone-based monitoring
✅ Accuracy
- Clinically proven CGM technology (based on Dexcom platform)
✅ Ease of Use
- Simple setup and wireless operation
- Continuous data without interaction
Cost & Availability
- Available in the UK via NHS (depending on eligibility) or self-funding
- Often positioned as a more affordable Dexcom option
⚠️ Considerations
- Typically, 10-day sensor wear (shorter than the Libre Plus range)
- Fewer advanced features vs the premium Dexcom models
Best For
- Users who want real-time alerts and simplicity
- Those who prefer the Dexcom ecosystem
