Wearables: Fitness Trackers

I run 4 times a week and fitness measurement are a way of knowing if my training is working or if I should change my workout. Currently, most trackers measure calories, time, and distance, but I want to add heart rate to that list.


My ideal Fitness Tracker:  

1) I don't want to spend more than $200, but I will if the device is multifunctional. 

2) I personally don't need another screen for email when I'm running because I don't want to think about work. So the display can notify me of a message, but I don't want to be able to read it. 

3) The heart rate sensor has to be accurate and measure 24/7. 

4) The device must relay all the information to an app on my iPhone and/or the cloud . 

5) A long battery life is important