Among Amazon's smorgasbord of Prime Day deals, a wide swath of Fitbit's wearable devices are on sale. The clear standout is the top-of-the-line Fitbit Sense, normally $300 but today discounted down to $199.95, even cheaper than the step-down Versa 3. It's available in either black or gold, with accompanying silicone bands, and it ships for free.

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