Withings’ Go boiled down the fitness tracker its its very essence: It’s basically just a huge e-ink countdown clock that tells you at a glance how much more walking, running, swimming, or even sleeping you need to do to reach your fitness goals. Best of all, it can run for about 8 months on a single watch battery, so you’ll basically never have to worry about charging it.

While supplies last, Amazon’s marked it down to just $50 in two different colors, the best price we’ve ever seen.