Do you wear your HRM all day or only when working out?

I have worn mine alone (without the chest strap) before or after a workout as a regular watch. Not often because it's bigger than my regular watch, but if I know I'm going to be working out later sometimes I wear it, and then put the chest strap on when I change into my gym clothes.

But I will say the watch only models aren't as accurate as the ones with a chest strap, so if you're shopping around, keep that in mind.

Only when I work out. Plastic doesn't really go with the look I'm going for with regular watches.

Hi! Mine is a watch, as well, so I wear it sometimes just for that, although it is a large watch. I have the chest strap, too, and so far I only use that for workouts. I was thinking about wearing it for a regular day of work just to see what it says, but I've heard that HRMs don't give as accurate of a calorie burn at lower heart rates...don't know if that's true or not. Nonetheless I think it would be an interesting comparison to make. In the same way, I plan to use it to measure my heart rate during regular activities like housecleaning and cooking, just out of curiosity.

Just while working out doing cardio.

Its not designed to be worn all day and will be grossly inaccurate. They are designed to read and process elevated heart rates and calculate calories burned from that. Not to mention you'll run that battery out quick on the chest transmitter leaving it going all day everyday.

If ya want something to wear all day you'll have to go the BodyBugg route or something similar.