Silly question, but kind of important since I want to get a good watch. :)Does anyone regularly use a "smart watch" (preferably for android) to take a pulse? I have no idea how they work and haven't had a chance to find a store that would let me play with them. When I see them on people's wrists the screen is black so I'm hesitant buy something I have to constantly touch to get the seconds to come up since I'm working with patients. On the other hand, I really like the "fitness" features some have.What do you use and would you recommend it?