This runs on Android Wear OS, which works with Android or iOS smart phones.
Brad's Deals Editor David,
Get this Moto 2nd Gen Moto 360 42mm Men's Smartwatch for $199.99 plus free expedited shipping at B&H Photo. This was the lowest price we found from a trusted retailer by $20. It pairs to Android or iOS smart phones and can display notifications and work as a fitness tracker, including heart rate monitoring. It also responds to voice commands. It has a dark finish with a black leather band. It's also available in a gold color. There is no sales tax (except NJ and NY).