Prime Day is June 23 to 26, and Lifehacker is sharing the best sales based on product reviews, comparisons, and price-tracking tools before it's over. 

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• New to Prime Day? We have a primer on everything you need to know. Sales are accurate at the time of publication, but prices and inventory are always subject to change.

Now that the screenless Fitbit Air has made its debut, it's hardly surprising that older Fitbits are on sale. But I think the existence of the Air actually makes older Fitbits seem like an even better deal: They can do everything the Air can do, plus they have a screen to tell you the time and show you a few metrics during your workouts. You don't even have to pay extra for this functionality—for Prime Day, the Charge 6 and Inspire 3 are cheaper than the Air, and in fact, both are at their lowest prices ever. Here are the best Prime Day fitbit deals I'm seeing on day three of the sale.

Fitbit Charge 6 Prime Day Deal

Original price: $159.95 | Current price: $75.99 (Save $84)

The Charge 6 is the newest Fitbit (before the Air), and it is the one I'd recommend for most people. It's on sale for Prime for $75.99 in the red color, and $85.45 in black or off-white. It has its own GPS, so it can track runs even if you don't bring your phone. If you do bring your phone with you, though, you also have access to Google Pay, directions from Google Maps, and (with a subscription) YouTube Music. You can read my review of the Charge 6 here. Compared to fitness watches, it's not impressive, but for a minimalist tracker, it does a lot more than the Air.

Fitbit Inspire 3 Prime Day Deal

Original price: $99.95 | Current price: $66.45 (Save $33)

I used to think of the Inspire 3 as the Charge 6's less-capable sibling, but now I think of it as more of a Fitbit Air that also has a screen. It doesn't have GPS or payments, but it's a small wristband that can tell you the time and tell you your heart rate during workouts. The yellow and black versions are currently $66.45, and the lilac is just a few dollars more, at $69.95.

Fitbit Versa 4 Prime Day Deal

Original price: $199.95 | Current price: $124.45 (Save $75)

The Versa line is one of Fitbit's smartwatch devices, with a square screen that's a bit reminiscent of an Apple Watch. The Versa 4 is $124.45 in black, with other colors for a few extra dollars. The Versa 4 has its own GPS, can take calls and receive texts if your phone is in range, and has Google Wallet and Maps.

Fitbit Sense 2 Prime Day Deal

Original price: $249.95 | Current price: $197.90 (Save $52)

The Sense 2 is technically not on a Prime Day deal; it's just on a long-running sale. The Sense 2 is also a Fitbit-styled smartwatch, similar to the Versa 4, but it adds ECG capabilities. That said, if you're looking for a square smartwatch that does more than a garden-variety Fitbit, perhaps you'd be better off with one of the Apple Watches that's on sale today—such as the SE 3 at $199.

Looking for something else? Retailers like Walmart and Best Buy run Prime Day-style sales that are especially useful if you don’t have Amazon Prime.

• Walmart’s Prime Day competition sale runs from June 22-28 and includes deals up to 50% off. It’s an especially good option if you have Walmart+. 

• Best Buy’s Prime Day competition sale runs from June 22-28, and has some of the best tech sales online. It’s an especially good option if you’re a My Best Buy “Plus” or “Total” member.

• Target’s Prime Day competition sale runs from June 23-26, with deals up to 50% off. You can become a Circle member for free.