[ryanmercer]

>That's different that wearing a tracking device ok your arm.

An activity tracking device on your arm can't determine what medication you are taking or what diagnosis you have unless it has a secret microphone that is recording every conversation and uploading it for analysis, which is what the concern the person you replied to quoted.

[phkahler]

Who doesnt have a phone? Who doesnt talk to people with a phone? If Google is secretly recording conversations almost everyone is covered regardless of what device they have - even no device.

[mc32]

But it can know how active / inactive you are and may also know your location(s) (if you enable that).