Smartwatches offer basic features and functionality when you use them as standalone devices. The real value they provide is when you sync them to your iPhone or Android powered device. This turns them into extensions or “remote controls” for your Smartphone, allowing you to view and send text messages, emails, phone calls and calendar/reminder events.
Android – Google’s Android operating system is used by Samsung, Nexus, Kyocera, Xperia, Excite, Motorola, HTC, Asus, Archos, LG, Sony, Dell, Huawei and many more devices to power their hardware.
iOS – All Apple products run iOS software to power their hardware.
If you are looking to get more out of your smartphone with a new smartwatch, make sure you purchase a smart watch that runs the same OS as your phone.