Review on SANAG Smart Watch: Heart Rate Monitor, Sleep Tracker & Waterproof Fitness Tracker for Android & iPhone (Black-2) by Nick Mcvey

I'm in love with this watch and also appreciate how accurate the vital signs settings are. I also can't figure out how many sport settings it has. My only gripe with the watch (like many of these watches) is that it only monitors your sleep patterns between certain hours of the night. I work as a NOC shift nurse so I sleep during the day and the watch never tracks my sleep pattern when I sleep all night after work. However, it will track my sleep patterns at night if I sleep like a normal person at night; hence the 4 stars. Otherwise no questions or complaints.