Some smart watches are designed to work with specific phones. This can be a double-edged sword. On one side, picking a watch that is built to work specifically with your phone may offer more features. On the other, your shiny new smart watch may not work with your phone at all. Always check to see, whether the phone is iOS-only, Android-only, or if it’s even more specific. Of course, some smart watches are platform agnostic and will work well with virtually any phone. If you have an older phone you may run into more compatibility issues, so always check the system requirements before you click Buy.