This estimation is conveyed on the main screen at the top of the electronics hub with a dimly-lit colored symbol scale from red to green, with red being critically stressed and green being unstressed. The symbol is by default a smiley that progressively frowns as the stress estimation increases, but can be swapped for: 1) a cute cat face 2) a number 3) an expressive stick figure 4) a flower growing and wilting; and more. This display is intended to be evident to both the user and other people near the user, but not offensively so.