Sensor data is incorrect (number of steps taken, heart rate, blood oxygen level, etc. do not match valid data)
Canyon Smart Watch and fitness wristbands have sensors (accelerometer and heart rate monitor). Based on the readings of these sensors, the number of steps, heart rate, blood oxygen level, and other indicators are measured and counted. The presence of these data does not guarantee the accuracy of measurement of physical quantities, and can only serve as an approximate indicator of the value. Canyon Smart Watches and fitness wristbands are not measuring devices.
The measurement may be also impeded by a protective film on the sensor. Make sure there is no protective film on the sensor, and if there is, carefully remove it. Do not use sharp metal objects for this: as it may damage the sensor.
Keep the sensor clean at all times. Grease and dirt on its surface can significantly distort its operation and sensor readings.