1. The simple wearing mode stopped working after two weeks of use; turning on the screen by raising the arm no longer worked (for example, to see the time). When the training mode is activated, however, the display is accurate, and when the arm is dropped, the screen turns off a few seconds later. Two weeks into training mode use, they ceased reacting to arm raises to activate the screen (to see the time). The "turn on the screen when raising your hand" option is checked in the "Health" app. Both the phone and the clock required restarting, but to no avail. The outcome was the same whether I checked the box within the software, restarted, or switched it off and on again, or rebooted the clock or the phone. Because of this, all I did was activate the tk-symbolized feature that always shows the current time. If this isn't done, pressing a button on the clock is the only option for checking the time.
If you're using an elliptical trainer and holding on to the grips while you work out, the clock will show you're walking at 120 or 98 steps per minute even though you're actually walking at 130 or 135 steps per minute (this is if you remove your hand from the handle and immediately look). When the hand that is holding the watch lets go of the simulator's handle, the number of steps done per minute begins to fluctuate. After this point, the user's step rate begins to rise, and it eventually converges with the value shown on the simulator (with an error of 2-4 steps). I think the amount of steps per minute plays a role in determining total calorie expenditure. So, the discrepancy between calorie counting and "training" one is rather noticeable up to a heart rate of 130 (on the simulator 500, at 100-120 hours), but begins to "catch up" at a pulse of 150-160. At an average load of 200–205W on the elliptical trainer and a resting heart rate of 150–153, the watch indicates a caloric expenditure of 850–860.
Third, while using headphones (a variety of phone-based wireless headphones), the watch's music player could start playing music unintentionally at any time (perhaps it was touched with a wet towel when wiping, and the music started working). Hence, music from one player in the phone plays in the headphones, while another one plays from the clock, presumably from music, and in the headphones I could not hear that the clock was shouting at the bottom of the hall.
