Best fitness trackers in the UK: a dated comparison, with the real three-year cost

How was this comparison made?

This is a dated comparison, not a ranking. Chutex has not worn or tested any of the devices below. Every cell in the tables comes from a maker’s own UK page or a published study, and carries a source number. Where a page did not state a fact, the cell says so. Prices were read on 2026-10-16 and will move.

The criteria are the ones that decide most purchases: the price you pay on the day, whether a subscription is required or optional, the battery life the maker claims, whether the device has its own GPS or borrows your phone’s, and whether it has a screen. Battery figures are maker claims, not measurements.

Maker pages are commercial sources. They tell you what a company says its product does and what it charges, and nothing more. The accuracy section further down uses published studies instead.

How do the main fitness trackers compare?

A few things stand out without any ranking. Three of the bands in the table have no screen: the Polar Loop, the Garmin CIRQA and Elio. The Fitbit Charge 6 has the lowest sticker price at £139.99 and is the only band in the table with built-in GPS stated. Polar says the Loop uses your phone’s GPS.

Two further points on the sums. Prices in the table are as shown on each maker’s page, and the pages do not all say whether VAT is included, so gaps between them are not always like-for-like. The CIRQA was listed as shipping in 8 to 12 weeks at the time of reading.²

Which kind of tracker suits which person?

Instead of a winner, here are the trade-offs the sources support. Pick the line that matches how you will use the device.

If you want sleep and recovery data without a lit screen on your wrist

The Polar Loop, the Garmin CIRQA and Elio have no screen. Polar says the Loop is screen-free and subscription-free and weighs 29 g.⁶ Garmin describes the CIRQA as a subscription-free tracker with 24/7 health and sleep tracking.² Chutex describes Elio as a screenless wellness band, with measurements that are indicative and not a diagnosis.¹¹ WHOOP also has no screen, but it needs a paid membership.⁸

If you want GPS for runs

The Fitbit Charge 6 has GPS built in.⁵ Garmin presents the Forerunner 70 as a running watch with a colour touchscreen and up to 13 days of battery.⁴ A band without its own GPS can still log a route if your phone comes with you, as the Polar Loop does through its app.⁶

If you want to keep the starting price low

On the prices read, the Fitbit Charge 6 (£139.99) and the Polar Loop (£149.50) are the two lowest. Look at the next section before deciding, because an optional plan changes the three-year picture.

If you prefer a ring

Oura makes a ring and charges a membership for it. The ring’s price in pounds was not available on the page read, so a ring cannot be costed here.⁷ See the separate smart ring comparison and the Oura and WHOOP comparison.

What does each tracker cost over three years?

A purchase price is only part of the cost. The sum below adds the optional or required plan for 36 months, using the prices read on 2026-10-16. It is an illustration of how plans add up, not a prediction.

Notice how far the order moves. The Fitbit Charge 6 has the lowest starting price, and the Polar Loop beats it only once the plan is counted. Over 12 months, the Oura membership is 12 x 5.99 = £71.88 monthly against £69.99 yearly, a saving of £1.89, about 2.6%.⁷

How accurate are wrist trackers?

Accuracy is the question the maker pages cannot answer. Studies can, within limits: they test particular models on small groups, and the devices change faster than the research.

The practical reading is simple. Trust a tracker for steps, treat its heart rate as a good guide while you are still, and treat its calorie figure as a rough number. That also answers the question about weight: a calorie total from a wrist is not accurate enough to plan around, and this page makes no promise about weight. For the arithmetic of energy use, see how many calories you burn.

How can you compare two trackers fairly? A seven-day protocol

If you are choosing between two devices, borrow or buy one at a time and keep the conditions the same. This is a method you can follow yourself. Chutex has not run it on the devices above.

1. Fix the criteria first. Write down what you want from the device: steps, sleep, resting heart rate, battery life or comfort.
2. Wear each one for seven days. Wear the same device on the same wrist, day and night, so the weekday mix is the same in both weeks.
3. Log the same three numbers. Record steps, hours slept and resting heart rate each morning in a notebook or spreadsheet.
4. Check one number by hand. Count your pulse for 60 seconds after five minutes of rest, and compare it with the device. See normal resting heart rate.
5. Note comfort and upkeep. Record how often you charged it, whether the strap irritated your skin, and whether you stopped wearing it.

Seven days is short, so treat the result as a first impression. Differences of a few steps or beats are within the noise of consumer devices.

What can a fitness tracker not do?

A tracker is a wellness device. It can show trends in your activity, sleep and resting heart rate. It cannot diagnose a condition. Elio’s own page describes it as a wellness band with indicative measurements.¹¹

A tracker also does not set your goal. For adults aged 19 to 64, the NHS advises at least 150 minutes of moderate activity a week or 75 minutes of vigorous activity, and speaking to your GP first if you have not exercised for some time or have a medical problem.¹² A tracker helps you count minutes. It does not tell you what is safe for you.

If a reading worries you, such as a resting heart rate that is always fast or irregular, speak to a GP instead of relying on the device. For sleep, see sleep stages. For a wider choice of sleep devices, see the sleep tracker comparison. For body measures, see smart scales.

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