Product FAQs
CGM Basics FAQs
Benefits of using Continuous Glucose Monitoring (CGM)
Learn about the 5 benefits of using Continuous Glucose Monitoring (CGM). From zero fingersticks to knowing your sensor glucose readings from your phone.
Is my smartphone compatible with the Dexcom ONE app?
Check if your smartphone is compatible with the Dexcom One app. View iOS and Android compatible devices.
Dexcom CGM sensor versus Blood Glucose Value BGV
What is the difference of a Dexcom CGM sensor glucose value and blood glucose value? Dexcom CGM measures interstitial fluid. BGV measures blood.
What is Continuous Glucose Monitoring (CGM)
What is Continuous Glucose Monitoring (CGM)? Discover how Dexcom CGM provides 24/7 tracking to show glucose direction and rate of change. Read more.
Getting Started
How do I set up and use Dexcom ONE alerts?
Dexcom ONE gives you the option of turning on alerts when you set up. You can also customise alerts.
What happens if my sensor insertion causes bleeding?
Dexcom ONE insertion needle may cause bleeding if it penetrates a blood vessel.
How do I find my sensor readings and glucose trend screen in my app?
Dexcom ONE sensor glucose readings and trend graph appear on app home screen.
How do I create a Dexcom user account?
To create an online account with Dexcom: Go to dexcom.com. Tap Create Account.
Your First 10 Days with Dexcom ONE
How do I keep my sensor on for the full 10-day wear?
Patch adhesion and tips on sensor insertion will provide advice on how to keep your sensor on for the full 10 days. Also see your user guide for more info.
How do I replace my sensor and start a new sensor session?
Find out how to replace your sensor and start a new sensor session. There are two ways to end your sensor session and start a new one.
My 10-day sensor session is going to end soon, and I want to change my sensor early. Can I change the sensor now?
Yes. Find out how.
What does the Signal Loss alert mean?
This alert tells you when you’re not getting Dexcom ONE readings. Find out how to fix this.
Using Dexcom ONE in the Long Run
I received a Brief Sensor Issue Alert. What does this mean?
Your sensor is temporarily unable to measure glucose.
What do I do if I receive the Sensor Failed alert
What do I do if I receive the Sensor Failed alert? Remove the failed sensor using the in-app Sensor removal instructions. Insert a new sensor then contact us.
What to do if Dexcom ONE applicator won't come off
What do I do if my Dexcom ONE applicator won't come off? Simply remove the applicator and sensor following these instructions.
Transmitter not working | Asking to pair new transmitter
Why isn't my transmitter working, and/or why is my Dexcom CGM System telling me to pair a new transmitter? Find the answer on our FAQ.
Understand Your Diabetes Trends
What is Dexcom CLARITY?
The Dexcom CLARITY app highlights your glucose patterns, trends and statistics. You can even get weekly notifications and can share with your clinic
How do I log into Dexcom CLARITY?
Use the Dexcom CGM app or your internet browser. You must have a Dexcom account. Read more.
How can I share my Clarity reports with my healthcare professional?
Follow these instructions to share with your healthcare professional clinic.
How do I get to Dexcom CLARITY?
You can access it from an internet browser. The Dexcom CLARITY app is available from your smart device’s app store.
Dexcom ONE Mobile App
What happens if I do not update the app when prompted to do so?
For the best app performance, we encourage you to update the app to the latest version as soon as it becomes available.
How the app update will affect my Dexcom ONE app?
After the app update, you will recognise that alerts settings will be reset to default and other changes reset to default. Find out more in our summary.
What happens after I have completed the app update?
After the update, your low and high alert settings will be reset.
Is my smartphone compatible with the Dexcom ONE app?
Check if your smartphone is compatible with the Dexcom One app. View iOS and Android compatible devices.
Dexcom ONE Receiver
How can I purchase the Dexcom ONE receiver?
Visit our e-store to purchase the Dexcom ONE receiver.
Is the Dexcom ONE receiver water-resistant?
No, the Dexcom ONE receiver is not water-resistant. Keep it dry at all times.
Is there any difference between Dexcom ONE app and Dexcom ONE receiver?
The Dexcom ONE receiver is a dedicated medical device. The app is not. Read more here.
How do I set up my receiver?
To set up your receiver, refer to the Set up receiver section in the Dexcom ONE Start Here guide, or watch a short video here.