Bangle.getStepCount() vs Bangle.getHealthStatus("day").steps

Wondering what exactly Bangle.getStepCount() returns. Step count from what point ?
Also wonder what other options exist for Bangle.getHealthStatus(arg);

>Bangle.getStepCount();
=15200
>
>Bangle.getHealthStatus("day").steps
=3768
>
>WIDGETS.wpedom.getSteps();
=3733
>
>Bangle.getHealthStatus("week");
Uncaught Error: Unknown range name "week"
 at line 1 col 30
Bangle.getHealthStatus("week");
                             ^
>Bangle.getHealthStatus("month");
Uncaught Error: Unknown range name "month"
 at line 1 col 31
Bangle.getHealthStatus("month");
                              ^
>