Why? It doesn't look like there are any actual signs of spring in the photo. All the green looks like it's coming from moss or pine trees (which keep their needles through winter). The rest of the trees either only have dead brown leaves on them or none at all. The rest of the effect is just from warm light and/or processing.

I'm not saying global warming is fake and not to be worried or sad about it. But this photo and title seem misleading.

They do very specifically give the users a warning that it cannot detect heart attacks, it cannot detect strokes, it basically can only tell you if it thinks its a normal sinus rythm or potentially afib. Pretty sure thats about par for the course for other watches with similar features as well.