A:Answer You don't have to, but you'll only be using about 20% of the phone's capability. For example, you'll want to upload the results of your exercise(s) to the phone for a "master" of all of your data. Another example is the watch has GPS built in. If you run or ride bike many miles, you'll be able to see the route you took and keep it as history on your phone. The watch won't display your route or map. If you don't have a Smart Phone, I'd recommend against getting the watch. If you have one and only want to pair with the phone a couple of times a week to upload the data, it works well for that. When you have it paired all day, it can eliminate having to pull your phone out all the time to see notifications, or text message, that kind of thing. You can be around 15 - 30 feet away from your phone and still have it connected.
