Question Gear Fit Auto Unlock Feature working with S4?

Hi Folks,

I just received my Gear Fit. It installed fine after I downloaded the Gear Fit Manager on my S4 running 4.4.2. Notifications work fine and News Republic/Appy Geek are also working.

After reading the Manual I found out that there should be a Setting for "Auto Unlock" which I can't find/is not shown in my Gear Fit Manager. Does this feature only work with S5? I also tried different lock settings (pattern, none, swipe, pin) - but I don't have this feature.

Any idea?