1. Mobile payment
One of the most useful functions of a smartwatch is mobile payments. For example, the first-generation Apple Watch will be equipped with a near-field communication technology chip. This means that users will be able to swipe their watch to buy things.
2. Video communication
People have been talking about the "DiCK Tracy" phone for years, and now it's a reality. In fact, companies like Glide have developed many communication applications for smartwatches.

3. Take care of children
What does a smartwatch do? One of the big killer features in the early days of smartwatches was helping parents keep track of their kids. The rationale is simple: Parents want some way to stay connected with their kids throughout the day, and they're willing to pay for technology to do that.
4. Identification
At the gym, the user completes the scan with the fitness tracker and enters the gym. Once the user steps on the treadmill, it is automatically recognized, and the treadmill broadcasts the user's favorite content and TV channels.