SpO2 is not working on my Versa 4

[HoneyPie53]

Blood oxygen saturation (SpO2) not worked since I bought the device several years ago - any ideas why?

Moderator Edit: Clarified subject

[ManuFitbit]

Hi @HoneyPie53. Welcome to the community forums. 

Thank you for sharing the inquiry regarding Versa 4. Sorry to know that you haven't used this feature during this years.

Before considering other options, please take in consideration that SpO2 isn’t available in all regions. For more information on availability, see fitbit.com

On certain Fitbit devices, the SpO2 app is automatically added for users in select countries. If it’s not installed:

1. From the Today tab in the Fitbit app, tap the devices icon> your device.
2. Tap Gallery.
3. Search for "SpO2".
4. In the results, tap SpO2  or SpO2 Tracker > Install.

The SpO2 app doesn’t appear as an app on your watch; instead, it runs in the background to track your SpO2 data.

If you have trouble adding an SpO2 clock face or the SpO2 app to your Fitbit device, make sure you update your Fitbit device to run the latest firmware version. For instructions, see How do I update my Fitbit device?

If you see the message “SpO2 not installed” on your clock face, install the SpO2 Tracker app. For instructions, see How do I track blood oxygen saturation (SpO2) with my Fitbit device?.

If you see dashed lines on the clock face or SpO2 tile, a message that the SpO2 data couldn’t be read, or missing data in the Health Metrics tile in the Fitbit app on your phone, keep in mind the following:

• Your device doesn’t retroactively measure your SpO2 values. When you start using Fitbit SpO2, you’ll see dashed lines until after your next sleep session.
• You must get at least 3 hours of quality sleep. Data is only collected when you’re still. If you move a lot during your sleep or the sleep session is too short, you might not get SpO2 data.
• Charge your Fitbit device to make sure it’s able to collect data throughout your entire sleep session. Note that you may have to charge your Fitbit device more often when using an SpO2 clock face or app.
• You must sync your Fitbit device with the Fitbit app before the clock shows your SpO2 data. Note that it may take around an hour for your SpO2 values to appear after you sync your device. For troubleshooting syncing, see Why won't my Fitbit device sync?
• Turning off any SpO2 clock face or app permissions can cause the feature to stop functioning. For instructions on adjusting permissions, see How do I install and manage apps on my Fitbit device?
• Your Fitbit device must be able to consistently track your SpO2 data:
  • Wear your device slightly higher on your wrist.
  • Make sure your device is in contact with your skin.
  • Your device should be snug but not constricting.
  • Tattooed skin can impact the accuracy of the red and infrared sensors on your Fitbit device.