October Prime Day is here — again. Amazon’s annual sale is now semi-annual, and this one runs through Oct. 8. This event is officially called Prime Big Deal Days and lasts for two days. Amazon typically cuts prices on its company-owned brands, such as Kindle, Ring, and Alexa devices, during this sales event. But more retailers, including Apple, Samsung, Oura, Google, and Garmin, also slash prices on their smartwatches and health trackers to participate. This makes October Prime Day a great opportunity to buy a wishlist item you’ve been putting off or complete your holiday shopping early. Also: The best October Prime Day deals live nowI’m rounding up some of the best smartwatch and fitness tracker deals on sale during October Prime Day. I’m only including products I have either tested myself or that a ZDNET colleague has tested and recommended, because I know readers don’t have time for random product mentions — and neither do I. Best Prime Day smartwatch and fitness tracker deals 2025 More