Step counter and what makes a step a step.

2375725 said:

I need to know how or what makes the watch add a step to the counter

Rhythmic motion of your wrist.

2375725 said:

and if theres a way to adjust the sensitivity or recalibrate it. 

There is none.

Maybe I'm wrong, but for me it also depends on how steep is the slope

Slope? For counting steps?

the swinging of your wrist. Hold your wrist perfectly still while walking and you get no steps.

A slope will make a difference not because the watch takes that into account, but just your stride changes length up or down slope and that affects your arm swing timing as well

I think there is more to it than that. I can have my watch in the front pocket of a hoodie and it recognizes stairs and steps.

Yeah, wrong conversation. I cannot delete the reply

Dave said:

I think there is more to it than that. I can have my watch in the front pocket of a hoodie and it recognizes stairs and steps.

Yeah, I wrote about motion of the wrist because this is where one usually wears a watch, but the watch doesn't care if it swing on your arm or in a pocket. Any rhythmic motion will do.

Just sharing my experience:

Commuting to work I keep the F7 SS on my backpack. Every ride I get about 3k steps. It happens only when in contact with my change clothings. If it is in the pocket with iPhone and other electronics, I get nothing.

Gadgets!