Samsung Watch Health Sensors

Samsung Galaxy Watch health features can include heart rate, sleep tracking, blood oxygen, ECG, blood pressure and body composition, depending on the model, phone, region and software. Some features may not be available on all models or with all phones.

Please note: smartwatch health readings are intended for general wellness and fitness information. They are not a replacement for professional medical advice.

Step 1: Clean the rear sensors

Health readings can fail if the sensors are blocked.

1. Remove the watch.
2. Wipe the back of the watch with a soft dry cloth.
3. Make sure there is no sweat, dirt, lotion, dust or residue over the sensors.
4. Dry your wrist before testing again.

Do not use harsh chemicals or abrasive cleaning materials.

Step 2: Wear the watch correctly

Incorrect fit is one of the most common causes of poor health readings.

For best results:

• Wear the watch snugly, but not painfully tight.
• Position it slightly above the wrist bone.
• Make sure the rear sensors sit flat against the skin.
• Avoid wearing it too loose during workouts.
• Keep still while taking manual measurements.

Very loose straps, tattoos, thick hair, cold skin, heavy movement or poor contact with the wrist can affect readings.

Step 3: Restart the watch

1. Turn the watch off.
2. Wait a few seconds.
3. Turn it back on.
4. Try the health feature again.

This can help if Samsung Health or the sensor process has temporarily frozen.

Step 4: Update Samsung Health and watch software

1. Update the Samsung Health app on your phone.
2. Update Samsung Health on the watch, if available.
3. Update the Galaxy Wearable app.
4. Update the watch software through Galaxy Wearable.

Some health features also require Samsung Health Monitor, depending on the model and feature.

Step 5: Check app permissions

Health features may not work correctly if permissions are blocked.

On your phone, check permissions for:

• Samsung Health.
• Samsung Health Monitor.
• Galaxy Wearable.
• Galaxy Watch plug-in.

Allow relevant permissions such as sensors, nearby devices, location and notifications where requested.

Step 6: Check that the feature is supported

Not all Galaxy Watch models support every health feature. Some features also depend on the phone, country/region and app availability.

Examples:

• ECG and blood pressure usually require the Samsung Health Monitor app.
• Blood pressure may require calibration with a traditional blood pressure monitor.
• Body composition is only available on certain Galaxy Watch models.
• Some features may not work with unsupported phones or in unsupported regions.

If a feature is missing completely, check whether your exact watch model supports it.

Step 7: Check specific health feature settings

For heart rate:

• Open Samsung Health.
• Check heart rate measurement settings.
• Try a manual heart rate reading while sitting still.

For sleep tracking:

• Wear the watch while sleeping.
• Make sure the battery is charged before going to bed.
• Check sleep tracking settings in Samsung Health.
• Wear the watch snugly overnight.

For ECG or blood pressure:

• Open Samsung Health Monitor.
• Follow the setup instructions.
• Make sure the watch and phone are updated.
• For blood pressure, complete calibration if required.

For body composition:

• Wear the watch correctly.
• Keep your arms away from your body.
• Follow the on-screen instructions carefully.
• Make sure your fingers are touching the correct watch buttons when prompted.

Step 8: Check for physical damage

Inspect the watch for:

• Cracked rear glass.
• Deep scratches over the sensor area.
• Liquid damage.
• Corrosion.
• Swollen back cover.
• Impact damage.

Damage around the rear sensor area can affect health tracking.