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Fitness trackers are lighter, cheaper and last longer on a charge than smartwatches – ideal if you mainly want steps, sleep and heart rate.
We compared popular trackers sold in the UK on accuracy, comfort, battery life and app quality.
Quick comparison
| Product | Best for | Typical UK price |
|---|---|---|
| Fitbit Charge 6 | Best overall | £100–£140 |
| Garmin vivosmart 5 | Best slim tracker | £100–£130 |
| Xiaomi Smart Band 9 | Best budget | £30–£45 |
| Fitbit Inspire 3 | Best for beginners | £50–£70 |
The 4 best picks
1. Fitbit Charge 6 – Best overall
Built-in GPS, heart rate and a good app. Fitness tracker with GPS.
Why we like it:
- Affordable
- GPS
- Long battery
Watch out for:
- Small screen
- Premium subscription
Key specs: Battery: up to 7 days; GPS: Built-in.
Buy it if you want simple tracking. Skip it if you want a big screen. Typical UK price: £100–£140.
👉 Check the price of the Fitbit Charge 6 on Amazon.co.uk
2. Garmin vivosmart 5 – Best slim tracker
Comfortable, long battery and Garmin health stats. Slim tracker with Garmin health stats.
Why we like it:
- Long battery
- Comfortable
- Good app
Watch out for:
- No built-in GPS
Key specs: Battery: up to 7 days.
Buy it if you want a slim tracker. Skip it if you need built-in GPS. Typical UK price: £100–£130.
👉 Check the price of the Garmin vivosmart 5 on Amazon.co.uk
3. Xiaomi Smart Band 9 – Best budget
Bright screen and long battery for very little. Bright screen at a very low price.
Why we like it:
- Very cheap
- Bright screen
- Long battery
Watch out for:
- Basic app
Key specs: Battery: up to 21 days.
Buy it if you want cheap tracking. Skip it if you want detailed coaching. Typical UK price: £30–£45.
👉 Check the price of the Xiaomi Smart Band 9 on Amazon.co.uk
4. Fitbit Inspire 3 – Best for beginners
Simple, light and good at sleep tracking. Simple, light tracker.
Why we like it:
- Light
- Simple
- Good sleep tracking
Watch out for:
- Premium subscription for extras
Key specs: Battery: up to 10 days.
Buy it if you want a simple first tracker. Skip it if you want GPS. Typical UK price: £50–£70.
👉 Check the price of the Fitbit Inspire 3 on Amazon.co.uk
How to choose the right one
Tracker or smartwatch?
Trackers focus on health data and last longer; smartwatches add apps, payments and bigger screens.
Subscriptions
Some features, such as Fitbit Premium insights, need a subscription – check before buying.
Getting accurate data
Wear your tracker snugly a finger’s width above your wrist bone. For workouts, tighten it slightly for better heart-rate readings. Sync regularly so the app can show trends rather than single readings.
Sleep tracking
Trackers estimate sleep stages from movement and heart rate. Look at weekly patterns rather than any single night, and use the data to build a consistent bedtime routine.
Setting realistic goals
The NHS recommends at least 150 minutes of moderate activity a week. Set your tracker’s daily goal around your current level and increase it gradually, rather than starting at 10,000 steps if you are far from it.
Fitness tracker or smart ring?
Smart rings track sleep and recovery discreetly with long battery life, but they lack a screen and usually cost more. For steps, notifications and workouts, a band-style tracker is still the better value choice. If you mainly care about sleep and want something you forget you are wearing, a ring is worth a look.
Water resistance and swimming
Most trackers are water resistant to 5 ATM, which means they are fine for showering and pool swimming. Some can track lengths and strokes automatically. Avoid hot tubs and saunas, as heat can damage seals over time, and rinse the tracker in fresh water after sea or chlorinated pool swims.
Buying tips for UK shoppers
If you swim, check the water resistance rating – most trackers handle pool swimming.
How we chose these products
We compared manufacturer specifications, UK warranty terms, running costs and typical UK prices, and only included products that are widely available from UK retailers. Our picks are based on this research, not on lab tests we have not carried out. Read our editorial guidelines to see how we work.
Frequently asked questions
Are cheap fitness trackers accurate?
For steps and sleep trends, good budget trackers are reasonably accurate.
Do fitness trackers need a subscription?
Core tracking is free; some advanced insights are paid.
Which tracker has the longest battery?
Budget bands like the Xiaomi Smart Band 9 often last two weeks or more.
Our verdict
The Fitbit Charge 6 is the best all-round tracker; choose Xiaomi on a budget or Garmin for a slim design.