Polar Loop review: Free screen fitness tracker is great for heart rate, but downloadable software
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The Polar Loop: A one-minute review
The Polar Loop is, at the top, what most people are looking for. It’s a lifestyle wearable like the popular Whoop MG, but doesn’t come with a mandatory monthly subscription.
It has no screen, a lightweight body and a fabric strap for maximum comfort. Polar kept the Loop simple, offering a limited set of features rather than trying to cram in too many extras. It tracks your sleep, your steps and has a habit of recognizing and logging activity times – running, walking and so on. This part is patchy, but the Polar Loop will never be as good as one of the fitness trackers for the serious exerciser crowd.
The problems with the Polar Loop are mostly software based. You have to go with the Polar app to make the Loop fun to use, and its interface and data presentation could really do with some rethinking. This is planned for the future, but for now, this isn’t really the Whoop killer you can count on. It is shown on the front by the cheap Amazfit Helio band.
As it is, what you get is a decent screen tracker, but one that will probably get better later in its life – after a software update, at least.
The Polar Loop: Details
|
Element |
The Polar Loop |
|
Price |
$199 / £149.50 / AU$299 |
|
Size |
42 x 27 x 9mm |
|
Weight |
29g with strap |
|
Case/bezel |
Stainless Steel/Plastic |
|
Show |
N/A |
|
GPS |
N/A |
|
Battery life |
Up to 8 days |
|
Communication |
Bluetooth |
|
Water resistance |
Yes, 3ATM |
The Polar Loop: Price and availability
- $199 in the US
- £149.50 in the UK
- AU$299 in Australia
The Polar Loop was introduced in early September 2025 as an alternative subscription method to the Whoop band. It’s been a little over a year since the launch of the Polar 360, a business-focused wearable that’s very similar to the consumer version. It costs $199 in the US, £149.50 in the UK and AU$299 in Australia.
While there are no ongoing costs, there is a subscription option called the Polar Fitness Program, which works out a flexible training plan for you. This costs 9.99 Euro per month after the free trial. This is a much better value than Whoop, which doesn’t sell you a device at all – just an expensive subscription. But with a fitness tracker that’s not really the case do much, much more expensive.
The Polar Loop: Design
- Off screen
- Metal accents
- Stretch bands are free
The Polar Loop is similar enough to the Whoop band that Whoop is suing Polar and claiming the company named its design. However, this is really the focus of several conferences that have already been seen across the screen wearable space.
Polar uses a fabric band that weaves, like a belt, over the main unit of the wearable. It covers where the screen would be on a regular watch. The Loop uses a velcro-style fastener and is clearly designed to look like a wearable health over a solid fitness gadget. While most of the core bricks are plastic, the upper and outer parts are bronze-shaded alloy steel. It’s there to give a touch of class.
These screenless wearables are meant to be the kind of gadget you set and forget, at least until the battery runs out. The Polar Loop weighs 29g, including the strap, light enough not to take any real strain as you swing your arms around unlike a watch like the Apple Watch Ultra, which weighs around 60g. But you’ll still see those familiar leather indents if you remove the watch from time to time, pressing its contours against your wrist.
Is it comfortable? Indeed, these slightly stretchy fabric belts are ace for comfort. But I found the Amazfit Helio Band a little easier to forget I’m wearing, no doubt because it’s even lighter: just 20g.
The Polar Loop has no buttons and no LED status indicator. You can’t interact with it if you try. There’s not even a vibration motor: it’s about as stripped back as Polar can make it. Water resistance is rated at WR30, which in some wearables is often considered insufficient for safe swimming, while Polar says the Loop is suitable for “bathing and swimming” under the ISO22810 standard, not just diving or skiing.
Polar Loop: Features
- There is no registration
- Very little interaction
- Precision Prime heart rate sensor from 2018
One of the main appeals of the Polar Loop, of course, is that there is no mandatory registration. There is a paid part of the app, though.
It’s called the Polar Fitness Program, which costs about $11 a month (9.99 Euro). Launched in April 2025, it offers personalized workout plans. It would work much better when paired with regular Polar fitness watches, like the Polar Grit X2, than the Loop.
The Polar Loop feature set is very stripped back. You can’t, for example, have the watch broadcast its heart rate data for use by another device. There is no altimeter, so the number of steps climbed is not recorded. You cannot use the Polar Loop as an alarm as there is no vibration motor. When the Polar Loop runs out of battery you’ll automatically get a constant reminder to charge on your phone. You know what’s funny? Polar actually released a tracker called the Loop 2 in 2015 that had vibration, and a partially hidden screen made up of 85 LEDs.
It’s not that band or the Polar Loop that records blood oxygenation data or, apart from heart rate, it uses green, red and orange LEDs. Polar calls this their Precision Prime system, and it’s been around for years. A similar design was found in the 2018 Polar Vantage V. That’s a lifetime ago in technical terms, but the basics still work.
The Polar Loop: Working
- 8 days of battery life
- Some job tracking errors
- HR data evaluation like the Garmin Elevate V5 sensor
Despite the lack of a screen, Polar says the Loop lasts eight days, actually slightly less than its other watches with displays. This is in money. You can expect it to last about a week. Since there is no GPS or screen, there should be little variation in how long it lasts based on your activity level.
Like any wearable, the Polar Loop relies heavily on its heart rate sensor for any data beyond your steps. This wearable is very good, despite using old hardware. While this isn’t a full-fledged runner’s watch replacement due to its lack of GPS, its HR data while running is a good match for the Garmin Forerunner 970 (one of Garmin’s best watches) and its Elevate V5 sensor, which was worn simultaneously for most of my testing.
The Polar Loop doesn’t tend to mess up the start of a workout, or show unexpected big spikes in HR during a workday when you’re doing more than clay. There was one unexpected spike in tracking time, but generally the results are solid here.
By default, the Polar Loop will record basic stats 24/7, then automatically log any slightly stretched squares it believes you’re exercising. Walk for 12 minutes? You can expect to see that from the Polar app. It’s not completely flawless, however; during one run, the Loop covered half an hour’s exercise and change, it seemed to stop during a short break, but failed to register the second part. The duration of some sessions is also closed, although you can always take an active approach to tracking: in the Polar phone app, you can manually start a tracking session, select Loop, and use it as a source of HR data.
Besides, the Polar Loop has a good stab at recording your daily steps. It also tracks sleep, too, measuring time spent in light, deep and REM sleep, and records disturbances. The Polar Loop is more sensitive to this than other wearable wake-up time detections, so you may see your sleep records littered with these small disturbances.
The leading figures Polar wants you to focus on are sleep duration, sleep intensity and recovery – basically how much that sleep gets your body back to where it needs to be. However, there is also an ANS Charge (autonomic nervous system charge) section where you can check breathing rate and heart rate variability.
All the basic details are here, and they sound good enough. The biggest problem with Polar Loop is that the phone app isn’t all that fun to use, it can look like it belongs to others and doesn’t guide the user that way and what they should be focusing on.
The home screen of the app is Diary, which acts as a feed of your day, showing the latest automatically tracked exercises, your step count and more, in chronological order. This isn’t as successful as the software on Amazfit’s rival Helio Strap app, which is intuitive and has a traffic light-style app to alert you of any stats that might be out of the ordinary.
Screenless wearables are highly dependent on your applications for the overall quality of the experience. And the Polars could do with some work. It’s not just an inviting space to share. Polar plans to fully overhaul the app in the future, but for now we can only work with what we have.
The Polar Loop: Scorecard
|
Section |
Comment |
The result |
|
Price |
The lack of forced subscriptions is nice but this isn’t a great value tracker. |
3.5/5 |
|
Design |
It’s comfortable, looks decent and has high-quality metal features, and you get a choice of colors. |
4/5 |
|
Features |
A watch like this doesn’t need a lot of features, but it does miss a few elements that could be useful. |
2.5/5 |
|
Working |
Heart rate accuracy is good but you may not want to rely on automatic workout detection for accurate session logging. |
3/5 |
Polar Loop: Should I buy?
Buy if…
Don’t buy if…
Think again
First updated: December 2025
