Dexcom ONE
One small device. One simple app. One smart Continuous Glucose Monitoring (CGM) System.
Real time glucose numbers you can count on
Thanks to the exceptional accuracy1 of Dexcom ONE CGM, you can make treatment decisions, like insulin dosing, without finger pricks* or scanning. Dexcom ONE doesn't require any calibration to deliver accurate readings unlike other blood glucose monitoring systems.
* If your glucose alerts and readings from the Dexcom ONE do not match symptoms or expectations, use a blood glucose meter to make diabetes treatment decisions.
Alerts tell you when you're high or low
Your Dexcom ONE system can alert you whenever your glucose level falls outside of your preset High and Low glucose levels, so that you can take action. You can customise the alerts and even delay your first high alert.
Getting started is easy
The Dexcom ONE glucose sensor can be worn up to 10 days and has a slim profile, making it nearly invisible under clothing. Thanks to the sensor auto-applicator, it only takes the push of a button to insert the sensor's wire in an instant beneath the skin. In a study, 84% of Dexcom users reported painless sensor insertion1.
Dexcom ONE is available on the NHS for people with type 1 diabetes
New to using Dexcom ONE?
Get started on your journey to zero finger pricks* or scanning with our simple self-guided training programme.
Meet Dexcom ONE
Dexcom ONE Sensor
- Measures glucose levels just under the skin
- Can be used for up to 10 days
- Is water-resistant (e.g. shower, swimming)||||
Dexcom ONE transmitter
- Sends glucose readings every 5 minutes to your compatible smartphone§
- Lasts 90 days - will be re-used across multiple sensors
Dexcom ONE App on a compatible smartphone§
- Provides glucose readings and High/Low alerts
- Available for free on Apple or Android app stores
- Compatible smartphone required
- Dexcom ONE can also be used with an optional receiver¶
“This little sensor allows me to set boundaries.”
“It alerts me so I can adjust my insulin in advance. It shows how each food affects me, helps me to choose what to eat and when. I know how sports and stress affect me, I track my low glucose trends constantly!”
Gabriela G., Dexcom Warrior
T1D
T1D
The featured Warrior is a sponsored spokesperson of Dexcom.
Frequently Asked Questions
How do I insert my Dexcom ONE sensor?
Is it painful to insert a Dexcom ONE sensor?
Where can I wear Dexcom ONE?
Can I shower or swim while wearing my Dexcom ONE?
How accurate is my Dexcom ONE compared to my blood glucose meter?
Will using Dexcom ONE change my diabetes management routine?
Is my smartphone compatible with the Dexcom ONE?
Dexcom ONE is the right CGM for you if:
You have type 1 or type 2 diabetes and are looking for an easy and accessible CGM system.
Explore the Dexcom CGM Range
There's a Dexcom CGM for all people with Diabetes. Explore our products to find the right one for you.
* If your glucose alerts and readings Dexcom ONE do not match symptoms or expectations, use a blood glucose meter to make diabetes treatment decisions.
† Your transmitter and display device should be within 6 meters of each other.
‡ Arrow must be displayed with glucose number to make treatment decisions.
§ Compatible smart devices sold separately. For a list of compatible devices, visit dexcom.com/compatibility.
|| Compared to Blood Glucose Monitoring.
¶ A receiver can be acquired as an optional display device.
# Internet connection required to send data to Dexcom Clarity.
** Time in range was defined as 3.9-10.0 mmol/L.
†† Results obtained with a prior generation of a Dexcom rtCGM system. Similar results expected with Dexcom ONE given similar performance and feature sets and better usability.
‡‡ Upper Buttocks 2-17 years old.
§§ Access to Dexcom real-time CGM systems can vary in dierent parts of the UK. Talk to your diabetes healthcare team to find out more about access and which product would work best for you.
||||When properly installed, the Dexcom ONE sensor is water-resistant for up to 2.4 meters for 24 hours. The Dexcom ONE receiver is not water-resistant.
1 Wadwa RP, et al. Diabetes Technol Ther. 2018;20(6):395-402.
2 Shah V et al. Diabetes Technol Ther. 2018;20(6):428-433.
3 Results obtained with Dexcom G6, which uses the same applicator and sensor (and algorithm) as Dexcom ONE.
4 Beck RW et al. JAMA. 2017;317(4):371-378.
5 Beck RW et al. Ann Intern Med. 2017;167(6):365-374.
6 Lind M et al. JAMA. 2017;317(4):379-387.
7 D1 Post-Launch Research in BELL countries, May 2022. N=233.
8 Type 1 diabetes in adults: diagnosis and management. NICE guideline [NG17]. https://www.nice.org.uk/guidance/ng17.
9 Diabetes (type 1 and type 2) in children and young people: diagnosis and management. NICE guideline [NG18]. https://www.nice.org.uk/guidance/ng18.
10 Type 2 diabetes in adults: management. NICE guideline [NG28]. https://www.nice.org.uk/guidance/ng28.
† Your transmitter and display device should be within 6 meters of each other.
‡ Arrow must be displayed with glucose number to make treatment decisions.
§ Compatible smart devices sold separately. For a list of compatible devices, visit dexcom.com/compatibility.
|| Compared to Blood Glucose Monitoring.
¶ A receiver can be acquired as an optional display device.
# Internet connection required to send data to Dexcom Clarity.
** Time in range was defined as 3.9-10.0 mmol/L.
†† Results obtained with a prior generation of a Dexcom rtCGM system. Similar results expected with Dexcom ONE given similar performance and feature sets and better usability.
‡‡ Upper Buttocks 2-17 years old.
§§ Access to Dexcom real-time CGM systems can vary in dierent parts of the UK. Talk to your diabetes healthcare team to find out more about access and which product would work best for you.
||||When properly installed, the Dexcom ONE sensor is water-resistant for up to 2.4 meters for 24 hours. The Dexcom ONE receiver is not water-resistant.
1 Wadwa RP, et al. Diabetes Technol Ther. 2018;20(6):395-402.
2 Shah V et al. Diabetes Technol Ther. 2018;20(6):428-433.
3 Results obtained with Dexcom G6, which uses the same applicator and sensor (and algorithm) as Dexcom ONE.
4 Beck RW et al. JAMA. 2017;317(4):371-378.
5 Beck RW et al. Ann Intern Med. 2017;167(6):365-374.
6 Lind M et al. JAMA. 2017;317(4):379-387.
7 D1 Post-Launch Research in BELL countries, May 2022. N=233.
8 Type 1 diabetes in adults: diagnosis and management. NICE guideline [NG17]. https://www.nice.org.uk/guidance/ng17.
9 Diabetes (type 1 and type 2) in children and young people: diagnosis and management. NICE guideline [NG18]. https://www.nice.org.uk/guidance/ng18.
10 Type 2 diabetes in adults: management. NICE guideline [NG28]. https://www.nice.org.uk/guidance/ng28.