Dexcom ONE+ CGM System

Introduction to Dexcom One+ CGM System

What are the Dexcom ONE+ system components?

The Dexcom ONE+ CGM system components benefit from the following features: sensor and patch; applicator; display device; receiver (optional)
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Is it painful to insert a Dexcom ONE+ sensor?

The Dexcom auto applicator was designed for easier, more consistent sensor insertions.

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, but both the receiver and the app provide: current glucose information; an integrated Clarity card for glucose reports; customisable glucose alerts.

What is a Dexcom ONE+ receiver?

The Dexcom ONE+ receiver is an optional display device that can show your glucose readings and trends.

Using your Dexcom ONE+ CGM System

Are there any iPhone/iOS settings I should or shouldn’t use with my Dexcom ONE+ app?

Here are some recommended settings for iPhone devices, to help ensure you get all Dexcom ONE+ app alerts and sensor readings.

Can I view my Dexcom ONE+ data on an Android Wear watch?

Yes, you can check your CGM on your wrist! The Android app supports Android Wear watches to discreetly view your glucose reading, trend arrow, and trend graph.

What is the Dexcom ONE+ receiver battery longevity?

Battery longevity is about 7 days on a full charge, and it takes about 3 hours for the battery to fully charge.

Will logged Events show on my Clarity report?

Any event that is entered into your display device will show up on Dexcom Clarity graphs when your data is uploaded from your Dexcom ONE+ app or you upload your receiver to Clarity.

Setting up your DexcomONE+ CGM System

What is a sensor code and why do I need one?

Pairing with Dexcom ONE+ app: When starting a new sensor, use the camera on your smart device to scan the QR code printed on the applicator.

How do I set up my Dexcom ONE+ system?

Use these instructions to set up your display device and insert your sensor.

How do I set up and use Dexcom ONE+ alerts?

Dexcom ONE+ gives you the option of turning on alerts when you set up your system. You just follow the prompts on your screen. If you want to turn on or change your alerts after setup, go to Profile > Alerts.

Where do I insert my Dexcom ONE+ sensor?

All Dexcom ONE+ users can insert their sensors on their abdomen or the back of their upper arms.

Dexcom ONE+ Compatibility

What if my smartphone is NOT compatible with Dexcom ONE+?

If your smart device is not compatible with the Dexcom ONE+ app, you may use a Dexcom ONE+ receiver as your display device.

Is my smartphone compatible with the Dexcom ONE+ app?

A variety of iOS and Android smart devices are compatible with the Dexcom ONE+ app. To view a list of compatible smart devices, visit

I want to get a new phone. Will this affect my Dexcom CGM?

A variety of iOS and Android smartphones are compatible with Dexcom CGM apps.

Troubleshooting your DexcomONE+ CGM System

What does the Signal Loss alert mean?

Your display device may be too far from your sensor or there may be something, such as a wall or water, between your sensor and your display device.

What does the "Bluetooth is off" alert mean?

The "Bluetooth is off" alert means this function is turned off. It will either show as App Bluetooth is off or Phone Bluetooth is off. Bluetooth must be on to get glucose information on your smart device*.

I received a Brief Sensor Issue Alert. What does this mean?

Your sensor has a temporary issue. This issue often happens during the first day of a sensor session, but it can happen anytime. It usually fixes itself within 3 hours.

What do I do if I receive the Sensor Failed alert?

This issue may happen anytime during a sensor session. If you get this alert, go to its Help screen for more information.

Replacing your DexcomONE+ sensor

My 10-day sensor session is going to end soon, and I want to change my sensor early. Can I change the sensor now?

The Dexcom ONE+ sensor is indicated to be worn for up to 10 days, plus a 12-hour grace period at the end. You can replace your sensor sooner.

How do I replace my sensor and start a new sensor session?

Each sensor session lasts up to 10 days with a 12-hour grace period at the end. The grace period gives you more time to replace your sensor, so you can do it when it's convenient for you.

How do I properly remove the sensor adhesive?

This is a summary of a clinical article published by clinicians independent from Dexcom, based on their knowledge and experience.* Dexcom has not tested these approaches, nor do we endorse these specific approaches.

Sharing DexcomONE+ with Followers

Can my Followers customise notifications?

Your Follower can customise notifications. For example, they can change their settings so they know when you go below 3.9 mmol/L for more than 30 minutes.

What are the recommended Android phone settings for Follow app?

Your phone settings can prevent the Dexcom Follow app from working. Learn more about the settings that will allow your app to work as expected.

How do I set up Share and invite Followers?

To set up Share, tap the Share icon on your app home screen. Then follow the instructions on the screens. Once you are set up, invite someone to become your Follower by tapping Invite Followers.

What is Dexcom Follow?

Remotely monitor a Dexcom CGM user's glucose with the Dexcom Follow app. Once a Sharer's invitation is accepted, the Follower can see data.

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