Fossil Watch Sport Smartwatch Grey Silicone FTW6025P. Fit for every style, this ultra lightweight 41mm Sport smartwatch features a neon silicone strap, lets you track your heart rate, track your workout, even swimming, customise your dial and more. Smartwatches powered with Wear OS by Google are compatible with iPhone and Android phones. Wear OS by Google and other related marks are trademarks of Google LLC. Touchscreen smartwatches powered with Wear OS by Google require a phone running Android OS 4.4 or iOS 9.3 . Supported features may vary between platforms.