1. What it does

Oximeter monitors your oxygen and heart rate levels. You need a compatible device - oximeter, or there are few wearables that allow us collecting SpO2 data too. See Breath rate detection and oxygenation measure docs for details.

The compatible oximeters are Berrymed oximeters with custom firmware. We did try a lot of oximeters that are on the market and these had the most reliable data.

Currently, only some Wear OS powered wearables can be used for SpO2 monitoring. Garmins and Galaxy watches are hopefully coming soon.

Note We have tested TicWatch 3. If you have Wear OS watch that can monitor SpO2, but this data are not collect by Sleep, please send us your application log (Left ☰ menu → (?) Support → Report a bug) and we will use the information from the log for adding support for this watch too.

2. Where to find it

Settings → Sleep tracking → Wearables → Pulse oximeter

Figure 1. Pulse oximter

3. Options

Pulse Oximeter (Bluetooth)

Enable the feature for compatible oximeters.

Pulse Oximeter (Wear OS…​)

Enable the feature for compatible wearables.

Low breath rate alarm

If enabled, an alarm will wake you up when you have an low breath rate episode. This tries to prevent your blood oxygen volume from dropping to dangerous levels.

Low breath rate alarm sensitivity

Set sensitivity for the low breath rate alarm.

Figure 2. Resulting sleep graph with SPO2 data

4. Guide

4.1. How to set up oximeter

  1. Turn on your oximeter

    1. If you have an older (non-BTLE) oximeter, pair it with your phone using the system bluetooth settings.

    2. If you have a newer (BTLE) oximeter, do not pair it.

  2. Connect the oximeter to the app by tapping Settings → Wearables → Pulse oximeter (Bluetooth)

Now when you start sleep tracking, Sleep will connect to your oximeter to gather SpO2 and HR data.

4.2. How to set up wearable

  1. Make sure the wearable is connected properly, and corresponding option is enabled in Settings → Wearables → Use wearable.

  2. Enable SpO2 data gathering in Settings → Sleep tracking → Wearables → Pulse oximeter (Wear Os…​).

5. Medical-grade home sleep apnea test (US only)

If you see high RDI levels when using an commodity oximeter you may consider to confirm or deny those results with a disposable home test for sleep apnea analyzed by medical professionals.

We have partnered with Sleep Master Solution to bring you such a test in the US, Read more.


Oximeter troubleshooting

1. OLD Oximeter (non BTLE)

The app can ONLY connect to the stress locator when it’s first paired with the phone (or removed and re-paired) and no other app has been used (e.g. StressLocator app).

2. NEW Oximeters (BTLE)

  • 2017 and beyond
    The app can only connect to the Oximeter when it is NOT PAIRED to the phone.