Sweat or water between your skin and the watch can affect the accuracy of heart rate readings. Please note that the heart rate sensor is disabled for the sport Swimming.

Loose strap: If you want to measure your heart rate during a sport session, you should wear a rubber strap. To ensure the heart rate sensor’s optimal performance, please make sure that your watch is snugly fitted to your wrist. We do not recommend wearing a steel bracelet as it may be difficult to tighten correctly.

Punctual or permanent alterations on your skin, such as an injury, scars or tattoos may have an impact on the heart rate sensor’s accuracy. Ink and colors can change the behavior of light through the skin and reduce performance.

Pins are obstructed or oxidized: Verify that the pins are clean, not obstructed, or oxidized.

SOFTWARE CHECK

Once the above elements verified, please follow the below steps :

Watch updates : the watch apps need to be up-to-date from the Google Play Store : Menu > Play Store > Manage apps > Update all

When assuming there is a delta accuracy between TAG Heuer devices and third-party devices, please provide the below elements and contact the Customer Care :

Watch model and serial number
Application concerned (ex: TAG Heuer Wellness, TAG Heuer Sports, third-party app…)
Screenshots and data reported of the sport sessions or heart rate points

*Data accuracy : Manufacturers apply their own algorithm and sensors, the data may be different from one and another.