If the Zip could be called an introductory activity tracker, the One might be the mainstream version for someone who knows what they’re looking for in this category. The Fitbit One is Fitbit’s second clip-on fitness or activity tracker. The Fitbit Zip is $59.95 from Fitbit, or as little as $54 from.

It’s able to track steps and distance traveled, as well as your “active minutes” for the day – fitbit likes to claim that all of their devices track calories, but that isn’t really true (you have to manually put your calories into the app or website, which will then display a total on the Zip). It has limited waterproofing, what Fitbit calls “sweat, rain, and splash proof.” They explicitly warn you not to swim with one. The Zip has a replaceable battery, but it isn’t rechargeable – it’s a watch-style cell that’s good for somewhere between three and six months of use, depending on level. Despite that, it still packs a low-resolution display that lets you keep track of your daily step count and other activity information, and syncs with almost any recent smartphone (an included dongle lets you sync with computers). In addition to being the most affordable tracker, it’s also one of Fitbit’s smallest models. Unlike the vast majority of activity trackers, this isn’t one to wrap around your wrist. If your activity tracking is something that you feel skittish getting questions about, the Zip can discreetly slip inside of a pocket, rendering it invisible if you like. The Fitbit Zip is the company’s most affordable fitness tracker, designed to clip to your shirt pocket or jeans. This is how the Fitbit models compare to each other, including the important differences that come with each bump in price and change in style. Not counting these smartwatches, however, leaves Fitbit sitting on top as the number one activity tracker – probably because they manage to offer so many products at various price points.

Fitness band sales are up – way up this year, and that doesn’t even include devices like the Apple Watch, which some estimates have pegged at moving more than seven million units so far. If you’re new to the idea of fitness and activity tracking, you’re not alone.

If you’ve decided on Fitbit for your activity tracking needs, you might be having a hard time figuring out exactly which one to buy. We’ve put together an article showing what sets each Fitbit apart, so you can pick the right one for your activity level - and your wallet.

Fitbit zip low battery notifier