Best October Prime Day smartwatch and fitness tracker deals

Prime Day is almost here -- again. Amazon's annual sale is now semi-annual, with the next one taking place Oct. 7-8. This one is called Prime Big Deal Days, and it's two days long. 

We can expect that Amazon will cut prices on its company-owned brands, like Kindle, Ring, and Alexa devices, during this deals event. But more retailers, including Apple, Samsung, Oura, Google, and Garmin, slash prices on their health trackers to participate. So, what does this mean for you? October Prime Day could be a great time to buy a wishlist item you've been putting off, or get your holiday shopping done early. 

Also: The best smartwatches we've tested

I'm rounding up some of the more attractive smartwatch and fitness tracker deals on sale ahead of and during the October Prime Day event. I'm only including products I have tested myself or a ...