The Activity app is one of Apple’s most important and powerful products. Its three brightly colored rings are changing people’s lives around the world, inspiring individuals to make healthier choices throughout their day.

The trouble is, if you want to use the Activity app, your only option right now is to buy an Apple Watch — and Apple Watches are expensive.

With this kind of game-changing product, Apple usually wants to reach as big an audience as possible. Take the iPod, for example. It was too expensive for some consumers. so Apple released a no-frills, sub-$99 version called the iPod Shuffle. Could a similar strategy work for the Activity app? An affordable activity band from Apple could be a Fitbit killer.

2016 has been a tough year for fitness trackers, with scientists questioning their effectiveness and headlines boldly proclaiming that “fitness trackers don’t work.”

And yet, sales of fitness trackers are healthier than ever, while struggling smartwatch makers are desperately trying to reposition their gadgets to muscle into the fitness market. So what is going on? If fitness trackers really don’t work, why are consumers still buying them?

Apple Watch may be the most recognizable product in the wearables space, but it isn’t the best-selling.

Sales of Apple Watch are down more than 70 percent, according to IDC Research, which cites third-quarter sales figures of the wearables market.

The writing has been on the wall for smartwatches ever since Cupertino chose to focus on sports and fitness features for Apple Watch Series 2. Smartwatch sales are plummeting, and fitness seems to be the only profitable area remaining in the wearables sector.

More evidence of this trend emerged this week, with smartwatch trailblazer Pebble reportedly being acquired by fitness wearables specialist Fitbit. We might very well be witnessing the demise of the smartwatch as we know it.

So how did we get here? Is Apple Watch really only fit for fitness, or could it still one day fulfill its destiny and become a true wrist-based computing platform?

Apple’s website confirms that Apple Watch Nike+ will become available October 28. Customers can preorder all four models of the device now, with prices starting at $369 for the 38mm variant and $399 for the 42mm.

Fitbit reported its best-ever holiday sales this week, but investors are fretting because the wearable maker’s guidance for the current quarter is lower than expected. Some analysts are questioning whether Fitbit can hold its own against competition from Cupertino.

Apple Watch has proved to be a fantastic fitness tracker for many Cult of Mac readers. So I was curious to find out how Fitbit’s trackers compare. They may be cheaper than Apple Watch, but are they as effective at promoting healthy habits?

The Activity app on your Apple Watch suggests new “Move goals” each week, based on how many calories you burned the previous week. To test how this works in practice, I accepted every new goal my Watch suggested during the past 10 weeks.

The Move goals became progressively more challenging as the test went on. They nearly doubled, from 950 to 1,840 calories, and I could no longer keep up. I realized that Apple is following the Peter Principle, and that’s why I was always destined to fail.

When you run with Apple Watch, swiping to the right in the Workout app reveals your heart rate. Does the device display this data just for curiosity value, or can Apple Watch heart rate information actually improve your running?

I’ve started cheating on my Apple Watch. It’s not that I don’t love it. It’s amazingly beautiful. It does stuff I didn’t even know I’d like. But when it comes to running wild in the outdoors, I’ve found a smartwatch that satisfies me more than Jony Ive’s wearable does.

For the past week I’ve been testing the Garmin Fenix 3, a top-of-the-line smartwatch from a company that’s made a name for itself by providing runners and outdoorsmen with some of the best wrist-worn fitness tech. I hate wearing the Fenix 3. While Apple Watch gently caresses my wrist, the Fenix 3 feels like I’ve strapped a tank to it. Yet it boasts features Apple Watch doesn’t have that I’m starting to think I can’t live without on runs and hikes.

I don’t plan to completely break up with the Apple Watch anytime soon, but I’m ditching it during my four-day trek through the Grand Canyon this weekend because there are still a couple things it needs to learn before it can truly be the best all-around fitness tracker.