A:Answerthey're in stock in most Best Buys in US as of July 2015 (and they seem to keep them in stock too as I've been in several different stores since in Boston area and also So. New Hampshire and noticed them on the shelves.
A:AnswerBestBuy.com has been Pre-Ordering the UP 3 and then taking it down quickly after. I would suggest to keep checking and then if you see the button Pre-Order it quickly.
A:AnswerJawbone has stated it will be available starting April 20th. You can see more information here:
https://jawbone.com/blog/jawbone-announces-up3-shipping/
A:AnswerYes it does. It uses your sleep data to let you know how often your rise from sleep and then advise you on foods, exercise, and other to help you sleep well.
A:AnswerThere is nothing about these bands that should interfere with a pace maker as they simply monitor your blood flow in your wrist and use clever algorithms to figure out things like effective heart rate, blood oxygen levels, etc. I wouldn't wear a chest HR monitor, however, without first asking your doctor -- it too is purely external and "just sits there" but the electronics in the sensor would be much closer to your pacemaker -- definitely a question for your cardiologist if you go this route! (I prefer the chest HR monitor for my workouts because it is a far more accurate device for strenuous workouts). The wrist HR devices (so far) work best for "steady motion" such as walking, jogging -- erratic motion (lifting weights, aggressive aerobics, etc. seem to cause a lot of misreadings).
