Firstly, i do not know if users of the smartwatch have noticed , but when the battery is really low like under 5% You can't acces the menu , only see the clock(home screen).
I would like if any developer could Take advantage of this and make this an option. I would like to have a locking formula based on home button For example the lockscreen on any android device. You press the button once you can only see the clock nothing more. Press it three times (or a combination that you desire) and You can acces your watch's usual menu.
Hence the secret . You have a secret smartwatch that apparently acts as a simple digital watch.