It might surprise you to learn that the Apple Watch isn't the only smartwatch you can use with an iPhone, and that the best smartwatch for iPhone can sometimes come from beyond the walls of Cupertino.

One five-star reviewer even added, “I love everything about it. …I love the fact that it is waterproof because I always ...

But there are a few key differences that you'll want to keep in mind before deciding which smartwatch is best for you. The biggest factor to note is price: the Series 5 starts at $399.00 ...