1. Please wear the Watch correctly. During stress measurement, you need to keep still. Shaking your arm will affect measurement accuracy.
2. The Watch uses an algorithm to calculate stress, and it allows for a certain range of error, which is normal.
3. When you start the measurement, make sure the indicator light on the case back of the Watch is flashing. If it is not flashing, it is recommended that you press the button on the Watch to enter Settings--System Menu, then click Restart. Or, long press the button, then click Restart, and then use it again to check.
4. To experience the latest firmware features, you can upgrade the firmware to the latest version in the app. To do this, open the app, go to the Device page, and click Device Upgrade.
5. If the above steps do not resolve the issue, press the button on Watch to enter Settings--System Menu. Click Reset. Then, check again to see if the issue is resolved.