A smart scale can help you stay consistent and accountable in a variety of ways. Most even have multiple user profiles, so ...

The Eufy P2 Pro tracks everything from weight to muscle mass to body fat and even builds a 3D model of your progress. It's smart, simple, and now under $40 for Prime Day.

Weight Watchers is recruiting for a randomized control trial that will test the addition of a connected scale into its online weight loss intervention, according to a posting on ClinicalTrials.gov.

And it is pretty inexpensive for a smart scale. You can get the Eufy Smart Scale C20 for $39.99 right now on Amazon. That’s a 33% discount compared to its normal list price of $59.99.