You can set a lock code to prevent others from accessing the contents of your smartwatch when it's not connected to your phone.
Slide your finger upwards starting from the bottom of the screen.
Press the settings icon.
Press Security and privacy.
Press Lock type.
Slide your finger across the screen to connect at least four points and follow the instructions on the screen to create a pattern as lock code.
Press Set PIN.
Key in the required PIN and follow the instructions on the screen to create a PIN as lock code.
Press Lock type and key in the current lock code.
Press the Home key to return to the home screen.