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Synchronizing CGM data with a smartwatch: A step-by-step guide

This article will provide you with instructions on how to sync CGM data with various smart watches such as Garmin, Samsung Galaxy and Apple Watch.

Article content:

  1. General information about CGM systems: Explaining the importance of CGM in diabetes management.
  2. Sync instructions for different watch models:
  • For Dexcom users (G7, G6, ONE): Description of the process of setting up synchronization with smart watches.
  • For FreeStyle Libre users (3, 2): Steps to synchronize with watches through specialized applications.
  1. Tips and recommendations: Tips for successful integration, solving common problems.
  2. Safety and consultation with a doctor: The importance of discussing the use of applications and unapproved methods with medical professionals.
Conclusions: Summary of the benefits of integrating CGM data with smartwatches to improve diabetes management.
  1. General information about CGM systems: Explaining the importance of CGM in diabetes management.
Continuous glucose monitoring (CGM) has revolutionized diabetes management by providing real-time data on blood glucose levels. Easy access to CGM data, especially during physical activities, is vital. This guide will allow you to sync your CGM data with your smartwatch, giving you access to up-to-the-minute glucose readings. Whether you’re using a Dexcom G7, G6, ONE, FreeStyle Libre 3 or 2, we’ve got you covered with step-by-step instructions. It is important to note that these methods do not transmit data directly to the watch, but require a mobile phone to receive the sensor data and transmit it to the watch. These supplements are not FDA or European approved and use at your own risk. We provide this information not for the purpose of providing advice, but to inform you of its existence.
  1. Synchronization instructions for different watch models:
To synchronize the sensor Dexcom G7 with Garmin smart watch:
  1. Activate your Dexcom G7 sensor through the official Dexcom G7 app and set up your Dexcom Share account by adding a “follower” (this can be yourself).
  1. Install the Garmin Connect IQ Store app on your phone.
  2. In the Garmin Connect IQ Store app, search for “Dexcom” and install “Dex CGM Watch Face”.
  3. Set up your watch face by entering your Dexcom login and password.
  4. There is also the option to install the Dexcom Widget or Dexcom Datafield via the Connect IQ Store to display glucose data during activities on the watch.
These steps will help you display glucose data from the Dexcom G7 on your Garmin watch. To view glucose data from the Dexcom G7 on the Samsung Galaxy Watch or other Wear OS watch , follow these steps:
  1. Open the app store on your Galaxy Watch and search for the “Blose” app.
  2. Download and install the Blose app on your watch.
  3. Set up the Blose app by following the instructions, including logging into your Dexcom Clarity account with your connected phone.
  1. You can customize various settings such as glucose units, glucose targets, alert settings, and watch face appearance.
  1. Find and install the Blose watch face from the available options in the app. Once installed, you can view Dexcom G7 sensor data directly on your Samsung Galaxy Watch.
The Dexcom G7 app includes an app for Apple Watch. If the app didn’t install automatically, you can install it manually through the Watch app on your iPhone. On the Dexcom G7 application of your Apple Watch, you can conveniently monitor your current glucose level, observe the trend and view the glucose graph for the last 3 hours. For quick access to the G7 app on your watch, consider adding a complication to your watch face. This allows you to open the application with one click on the complication. The Dexcom G7 watch face complications are only compatible with certain watch faces. Please note that Apple Watch complications update information every 15-45 minutes.

To view glucose data from Dexcom G6 on Garmin Smartwatch:

  1. Activate the Dexcom G6 sensor through the official app and set up a Dexcom Share account by adding a follower (can be yourself).
  2. Install the Garmin Connect IQ Store app on your phone.
  3. Through the Garmin Connect IQ Store app, search for “Dexcom” and select “Dex CGM Watch Face”.
  4. Set up your watch face by entering your Dexcom login and password.
  5. If the watch face did not appear automatically, select it manually from the available ones.
  6. Also available is installation of Dexcom Widget or Dexcom Datafield via Connect IQ Store to display data during activities on the watch.

To access glucose data Dexcom G6 on Samsung Galaxy Watch or other watch with Wear OS, follow these steps:

  1. In the app store on your Galaxy Watch, find and install the “Blose” app.
  2. Set up the Blose app by signing in to your Dexcom Clarity account on your connected phone.
  3. Configure settings such as glucose units, glucose targets, alert settings, and watch face appearance.
  1. Set the Blose watch face from the available options in the app.

For Apple Watch:

  1. If the Dexcom G6 app didn’t automatically install on your Apple Watch, install it through the Watch app on your iPhone.
  2. In the Dexcom G6 app on Apple Watch, you will be able to monitor the current glucose level, the trend and the glucose graph for the last 3 hours.
  3. By adding a complication to your watch face, you can access the app faster.
  4. These complications are only compatible with certain watch faces and are updated every 15-45 minutes.

Unfortunately, there is no direct way to synchronize the Dexcom ONE transmitter data with your smartwatch. However, you can replace your Dexcom ONE sensor with a Dexcom G6 sensor. This will allow you to transfer the sensor data to your smartwatch as described in the previous section.

To receive sensor data FreeStyle Libre 3 on Garmin Smartwatch or to any watch that connects to Juggluco: 

1. Start the FreeStyle Libre 3 sensor using the official FreeStyle Libre 3 app and create a LibreLinkUp account by adding a follower (this can be you, but you will need to use a different email address).

2. Download the Juggluco app via the Androidaps documentation site and follow the instructions to get the FreeStyle Libre 3 sensor data into the Juggluco app.

3. Install the Garmin Connect IQ Store app on your phone and download the Kerfstok app.

4. If your Garmin watch is connected to your phone, open the Kerfstok app and select a watch face that shows the time, date, battery level, heart rate, glucose level, and glucose trend.

To get sensor data FreeStyle Libre 3 on Samsung Galaxy Smartwatch or other Wear OS watches, follow these steps:

1. Install the LibreLinkUp app and register as a follower in the FreeStyle Libre 3 app using a different email address than the one associated with your LibreView account.

2. Install the Gluroo Diabetes Logger app from the Play Store and link your FreeStyle Libre 3 sensor as a CGM data source to Gluroo.

3. On your Wear OS watch: Open the Google Play Store, find and install the Gluroo app, set the watch face to display glucose data from Gluroo.

To synchronize sensor data FreeStyle Libre 3 with Apple Watch:

1. Install the LibreLinkUp app and register as a follower in the FreeStyle Libre 3 app using the same process as for the Galaxy Watch.

2. Install the Gluroo Diabetes Logger app from the Apple Store and pair your FreeStyle Libre 3 sensor as a CGM data source.

3. Download the Nightguard app from the Apple Store, enter the Nightscout URL obtained from Gluroo in the Nightguard settings.

4. On your Apple Watch, set up the modular watch face with the Nightguard complication to view your glucose data. Please note that there may be a delay of about 5 minutes between the sensor readings and those displayed on the watch.

To synchronize the FreeStyle Libre 2 sensor:

1. Start by activating the sensor using the official LibreLink app.

2. After the warm-up time (1 hour), disconnect the sensor from the LibreLink application by turning off notifications in the application and Bluetooth connection in the Bluetooth settings. You may have to force close the application.

3. You can now scan the sensor with an app similar to xDrip (such as Juggluco, Diabox, or Shuggah) to activate real-time CGM functionality with the FreeStyle Libre 2 sensor.

4. It is important to note that these applications do not transmit sensor data to LibreView (except Juggluco). For a full schedule in LibreView, you still need to scan the FreeStyle Libre 2 sensor with the LibreLink app every 8 hours.

To synchronize sensor data FreeStyle Libre 2 with Garmin Smartwatch:

1. Download the Diabox application to your phone from the website diaboxapp.com.

2. Configure the application to transfer data to smart watches in the settings (settings > integrations > enable “data transfer to smart watches”).

3. Download the xDrip+/Spike/Nightscout watch face from the Garmin Connect IQ Store and install it on your Garmin watch.

4. Or download the xDrip+/Spike/Nightscout Widget or Datafield from the Connect IQ Store to view Libre2 data in a widget or during activity.

5. If you have a Garmin Edge bike computer, you can use the xDrip+/Spike/Nightscout Datafield feature to display Libre2 data on it.

To synchronize sensor data FreeStyle Libre 2 with Samsung Smartwatch:

1. Download the Diabox app from diaboxapp.com and configure it to transfer data to the GWatch.

2. Install the G-Watch Wear app on your phone and smartwatch, and select Diabox as the data source in the app settings.

3. Use the Wearable Widgets app with G-Watch Wear to display Libre2 data as a complication or tile on your Samsung Galaxy smartwatch.

To synchronize sensor data FreeStyle Libre 2 with Apple Watch:

1. If you are using European FreeStyle Libre 2 sensors, download the Shuggah app from the App Store to your iPhone and scan the sensor with this app.

2. Open the Watch app on iPhone: search for Shuggah and install it on your Apple Watch.

3. Once installed, you can access Shuggah on your watch among the application icons. When you tap the app, you’ll see your glycemic index and a trending arrow with Libre.

4. For more convenient access to glucose data, you can integrate the Shuggah logo as a complication on the modular dial.

5. To see real-time glucose data, set up the Shuggah app to create calendar events. Change the middle complication of the watch face to “my calendar” to see real-time sensor data.

Please note that the Shuggah app uses its own algorithm to calculate blood glucose levels, which may result in slight differences compared to Libre 2 readings.

If you are using FreeStyle Libre 2 sensors from the US, the Shuggah app will not work.

You can use the following method:

1. Install the LibreLinkUp app and register as a follower in the FreeStyle Libre 2 app using a different email address than the one associated with your LibreView account. After this step, you will have two separate accounts: one for logging into the LibreLink application (LibreView account) and one for accessing LibreLinkUp (LibreLinkUp account).

2. Install the Gluroo Diabetes Logger app from the Apple Store and link your FreeStyle Libre 2 sensor as a CGM data source to Gluroo.

3. Download the Nightguard app from the Apple Store and enter the Nightscout URL obtained from Gluroo in the Nightguard settings to view the sensor data in the app.

On Apple Watch, open and hold the modular watch face to access the settings. Select one of the complications, then select a Nightguard complication, such as “BG Values ​​as Gauge” or “BG Values ​​as Text”. When you tap on the Nightguard complication, you’ll be able to view the full glucose graph. It is important to note that there may be a slight delay of about 5 minutes between the readings of the FreeStyle Libre 2 sensor and the values ​​displayed on the watch.

Tips and recommendations:

Successfully integrating CGM with smartwatches requires understanding the technical aspects and patience. It is recommended that you carefully follow the instructions for synchronization and take into account possible software updates. If you experience connection problems, it’s helpful to turn to online communities and forums for support and solutions to common problems.

Safety and doctor consultation: Be sure to discuss the use of any unapproved apps and syncing methods with your doctor or healthcare professional. This is important to ensure your safety, as such apps may not be approved by official medical authorities. It is important to consider the risks and take a responsible approach to managing your health.

Conclusion: Integrating CGM data with smartwatches can significantly improve diabetes management by providing convenient access to up-to-date glucose data. This can help you better control your condition and respond more quickly to changes in your glucose levels. Always consult with a medical professional to ensure the safety and effectiveness of such technological solutions.

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