What is the Fitbit ECG app?

The Fitbit ECG app is made up of the Fitbit ECG app on your Fitbit wrist-worn product and the Heart Rhythm Assessment, which is a section in the Fitbit app on your phone or tablet.

The Fitbit ECG app is used to create and record an ECG when you take a 30-second reading on your Fitbit wrist-worn product. The Fitbit ECG app analyzes the recording and presents the results on your Fitbit wrist-worn product, and also allows you to view your results on your phone or tablet.

You can find the Fitbit ECG app data in the ECG tile within the Health assessments section of the You tab in the Fitbit app. This tile is also used for onboarding, displaying past results, and exporting a PDF report.

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What is atrial fibrillation (AFib)?
Atrial fibrillation (AFib) is a type of irregular heart rhythm, caused when the upper chambers of the heart beat out of rhythm. Normally, the heart's upper and lower chambers work together. With AFib, the upper chambers contract chaotically and quickly. As a result, the lower chambers contract faster than usual. This sequence can lead to an irregular heart rhythm. Learn more from the CDC or by visiting the website of the European Society of Cardiology [https://www.escardio.org/].
What does the Fitbit ECG app detect?

The electrical sensors on your Fitbit wrist-worn product detect your heart rhythm. When you use the Fitbit ECG app, your heart rhythm data is analyzed for signs of AFib. Only a doctor can diagnose AFib, but the results of the assessment can let you know if your heart rhythm has signs of the condition.

With AFib, your heart may not always beat irregularly, making it hard to detect even in the doctor’s office. While this assessment can’t diagnose AFib, you can use it right from your wrist. Your results can help you have a better conversation with your doctor.

How does the Fitbit ECG app work?
Certain Fitbit wrist-worn products have electrical sensors on the back of the product and on the metal frame around the face (Fitbit Charge 5, Fitbit Charge 6, Fitbit Sense, and Fitbit Sense 2) or crown (the dial on the outside of Google Pixel Watch and Google Pixel Watch 2). When these sensors are in contact with your skin and the Fitbit ECG app is open, they record the electrical signals from your heartbeat. The Fitbit ECG app is qualitatively similar to a Lead I ECG in that it can be used to discriminate between AFib and normal sinus rhythm. However, it can’t detect all heart conditions. In a doctor’s office, a 12-lead ECG is typically used, which provides electrical information about the heart from 12 different angles.
Where can I find the Fitbit ECG app?

You can find the Fitbit ECG app on your Fitbit wrist-worn product by swiping left on the screen (Charge 5, Charge 6, and Sense), by pressing the button (Sense 2), or by pressing the crown (Google Pixel Watch and Google Pixel Watch 2). Past results can be found within the Health assessments section of the You tab in the Fitbit app on your phone or tablet.

If you don’t have the Fitbit ECG app installed, see How do I install the Fitbit ECG app?

Note that the Fitbit ECG app is only available in select locations at this time. If you’re not in a supported location, you see the message below:

Message in the Fitbit app that says: Oops, this isn't supported in your location... We're working to bring this feature to more countries. Try checking back later to see if we've expanded support to your location.

Additional countries will be added as regulatory clearance is obtained.

See fitbit.com/ecg for additional details.

How do I install the Fitbit ECG app?
If the Fitbit ECG app isn’t already installed on your Fitbit wrist-worn product, download it.
Fitbit Charge 5, Fitbit Charge 6, Fitbit Sense, and Fitbit Sense 2

1. With your Fitbit device nearby, from the Today tab in the Fitbit app, tap the devices icon   your device.

2. Tap Gallery Apps tab.

3. In the list of apps, tap ECG Install.

Google Pixel Watch and Google Pixel Watch 2

1. In the Play Store app  on your watch or phone, search for the Fitbit ECG app. If you use the Play Store on your phone, make sure your device is set to Google Pixel Watch.

2. Tap the Fitbit ECG app Install.

3. Open the Fitbit ECG app  on your watch. If you haven’t set up the Fitbit app on your phone, you’re prompted to do so. Follow the instructions to install and log in to the Fitbit app on your phone.

How do I use the Fitbit ECG app?

Before you take your first reading:

  1. Open the Fitbit app on your phone or tablet, and log in to your Fitbit account if you haven’t already done so.
  2. From the You tab in the Fitbit app, find the ECG tile in the Health assessments section. Tap Set up and follow the instructions. After you complete the Heart Rhythm Assessment introduction, you can take an ECG reading.

To take an ECG reading:

  1. Wear your Fitbit wrist-worn product snugly, but with enough room for comfort. It should sit a finger’s width above your wrist bone. For more information, see help.fitbit.com.
  2. Sit down and open the ECG app on your Fitbit wrist-worn product. Note that after you tap the ECG app icon, it can take several seconds for the app to load. During this time, you’ll see a black screen.
  3. Follow the instructions on your Fitbit wrist-worn product to start the assessment.
  4. Put your finger(s) on your Fitbit wrist-worn product as shown on the screen. Continue to hold the contact point(s) until the countdown is complete.
  5. When your results appear, swipe up to see the full report. Note that Google Pixel Watch and Google Pixel Watch 2 must be connected to LTE or Wi-Fi to sync your ECG data to the Fitbit app.
What does my Fitbit ECG app result mean?

After you complete the Heart Rhythm Assessment, you see one of the following results:

Normal sinus rhythm

Your heart rhythm appears normal.

Tap Learn more for more information or tap Done to exit the assessment.

Atrial fibrillation

Your heart rhythm shows signs of AFib.

You should contact your doctor. Tap Learn more for more information, or tap Done to exit the assessment.

Inconclusive

The Fitbit ECG app couldn’t get a good reading either because your heart rate was too low, too high, or there wasn’t a good enough signal. Tap Retake to try again, or tap Done to exit the assessment. For more information on why you might receive this result, see Why did I receive an inconclusive result?

Why did I receive an inconclusive result?

There are 3 types of inconclusive results you might receive after taking the assessment:

Inconclusive: High heart rate

If your heart rate is over 120 bpm, the Fitbit ECG app can’t assess your heart rhythm. Heart rate can be high for many reasons, such as:

  • Recent exercise
  • Stress
  • Nervousness
  • Alcohol
  • Dehydration
  • Infection
  • AFib, or other arrhythmia

Learn more from the American Heart Association or by visiting the website of the European Society of Cardiology [https://www.escardio.org/].

Inconclusive: Low heart rate

If your heart rate is under 50 bpm, the Fitbit ECG app can’t assess your heart rhythm. Heart rate can be low for many reasons, such as:

  • Taking certain medications such as beta-blockers or calcium channel blockers
  • Having excellent aerobic fitness
  • Other arrhythmia

Learn more from the American Heart Association or by visiting the website of the European Society of Cardiology [https://www.escardio.org/].

Inconclusive: Didn't get a good reading

There are many possible reasons for getting an inconclusive result, but common causes are:

  • Moving too much during the reading
  • Not resting your hands on a table
  • Wearing your device too loosely
  • Wearing your device on a wrist other than the one you specified
  • Being near electronics since this can interfere with the reading

If the Fitbit ECG app couldn’t get a good reading, try the following troubleshooting tips:

  • Make sure you’re sitting down and relaxed.
  • Rest your arms on a table while you take the assessment and avoid moving.
  • Check that your Fitbit wrist-worn product is on the wrist you selected when you started the assessment.
  • Keep your index finger(s) on your Fitbit wrist-worn product for the duration of the assessment.
  • Check the fit of your Fitbit wrist-worn product. It should feel comfortably secure, not too loose or too tight. Wear it a finger’s width above your wrist bone. For more information, see How do I wear my Fitbit device?
  • Ensure there is no interference with the electrode to skin contact (hair, jewelry, clothing, etc.)
  • Move away from other electronics to prevent interference.
  • Make sure your Fitbit wrist-worn product and wrist are clean and dry. Water or sweat can interfere with the reading. If you recently washed your hands, went swimming, showered, or perspired, clean and dry your Fitbit wrist-worn product. See fitbit.com/productcare for wear and care instructions.

Retake the assessment to try again. If you get an inconclusive result repeatedly, or you’re not feeling well, talk to your healthcare provider.

Why did the countdown timer restart during my Fitbit ECG reading?
If you remove your fingers from your Fitbit wrist-worn product or move too much during the ECG reading, the countdown timer restarts.
How do I save my Fitbit ECG results or look at them again later?

When you open the Fitbit app, your results transfer from your Fitbit wrist-worn product to the Fitbit app, and can be viewed on your phone or tablet. To see your results at a later time, such as during an appointment with your healthcare provider:

  1. From the You tab in the Fitbit app, find the ECG tile in the Health assessments section. Tap View history to see a list of all your previous results. The results are displayed with the date and time that they were taken on the compatible Fitbit wrist-worn product. This reflects the time on the wrist-worn product and not the time of syncing your results. It also does not account for travel across time zones.
  2. Tap any of the previous results to view the details. The results are displayed with the date and time that they were taken on the compatible Fitbit wrist-worn product. Within each result, tap Export a PDF for your doctor to download the report. You’ll receive a notification when your report is ready. We recommend using the latest version of Adobe Acrobat Reader to open the report.
If you don’t see the notification that your report is ready, you can find it by tapping the notifications icon  in the top right of the Fitbit app.
How do I delete my results?
  1. From the You tab in the Fitbit app, find the ECG tile in the Health assessments section. Tap View history to see a list of all your previous results.
  2. Tap the result you want to delete. Swipe to the bottom of the page, and tap Delete result.
How accurate is the Fitbit ECG app?
The Fitbit ECG app was tested in a clinical study of 440 people. During the study, each person completed a 30-second 12-Lead ECG recording while simultaneously using the Fitbit ECG app. The Fitbit ECG app software algorithm was able to correctly identify people with AFib 98.7% of the time and correctly identify people with a normal sinus rhythm 100% of the time.
Does my Fitbit wrist-worn product support the Fitbit ECG app?

The Fitbit ECG app is currently available on Fitbit Sense (running Fitbit OS 5.0+), Fitbit Sense 2, Fitbit Charge 5, Fitbit Charge 6, Google Pixel Watch, and Google Pixel Watch 2.

To access the Heart Rhythm Assessment, install the Fitbit app on your phone or tablet. To verify that your phone or tablet is compatible with the Fitbit app, see fitbit.com/devices.

Why don’t I see my ECG results in the Fitbit app?
Sync your Fitbit wrist-worn product to see your ECG results in the Fitbit app. If you have trouble syncing, see Why won't my Fitbit device sync? Note that Google Pixel Watch and Google Pixel Watch 2 must be connected to LTE or Wi-Fi to sync your ECG data to the Fitbit app.
Can I export a report of my Fitbit ECG results?

For instructions on how to export an individual result, see How do I save my Fitbit ECG results or look at them again later?

With a Fitbit Premium subscription, export a 30-day or 12-month summary of your results in your Wellness Report. For more information see What should I know about Fitbit Premium?

What’s the difference between the Fitbit ECG app and Fitbit Irregular Rhythm Notifications?

The Fitbit ECG app uses electrical sensors on the back of your compatible Fitbit wrist-worn product and on the metal frame around its face (Fitbit Charge 5, Fitbit Charge 6, Fitbit Sense, and Fitbit Sense 2) or crown (Google Pixel Watch and Google Pixel Watch 2) to allow you to record the electrical signals from your heartbeat during a 30-second reading. The Fitbit ECG app is qualitatively similar to a Lead I ECG in that it can be used to discriminate between AFib and normal sinus rhythm. The Fitbit ECG app analyzes the recording and presents the results on your watch or tracker.

Fitbit Irregular Rhythm Notifications collects pulse rate data in the background when you’re still or at rest by analyzing beat-to-beat measurements. It uses the optical pulse-rate sensor on your compatible wrist-worn product to identify heart rhythm changes. If multiple readings show an irregular pulse rate that may be AFib, you receive a notification. Data isn’t analyzed in real-time. For more information, see How do Fitbit Irregular Rhythm Notifications check for atrial fibrillation (AFib)?

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