Which? Best Buy fitness trackers
Looking to buy a fitness tracker? Nobody goes to the same lengths we do to uncover the most accurate, most comfortable, and most reliable wearables.
You can be sure that a Best Buy fitness tracker will tick the boxes, but will also want to avoid to avoid a Don't Buy, which is likely to let you down on critical measures.
What makes a Best Buy fitness tracker?
Our lab testing has uncovered plenty of fitness trackers that are inaccurate, including ones that will clock up steps even when you're just moving your arms – so, you may think you're hitting your step target when you're not. We've also seen models that give wildly inaccurate heart rate readings.
- We've reviewed fitness trackers for every budget – from under £20 to more than £160. Most Best Buys are over £70, but you can find some decent devices for less.
- Our reviews cover models from all the main activity tracker brands, including Fitbit, Garmin, Honor, Huawei, Polar, Samsung, Withings and Xiaomi.
- We focus on what’s important: our testers assess every watch and tracker for accuracy, comfort and ease of use.
- Our experts cut through the jargon and hype of new technology to unearth the genuinely useful features of every fitness and activity tracker. They’ll put sensors and apps to the test to make sure the core features work as advertised.
Our expert testers spend weeks trying out each fitness tracker and the phone app that comes with it, so that we can tell you what it's really like to live with each device day-to-day. Join Which? to access all our in-depth fitness tracker reviews. Already a member? Log in to find the best fitness tracker for you.
How we test the best fitness and activity trackers
We put each fitness tracker through a series of tough lab tests and have found some great models that earn our Best Buy recommendation. But we’ve also found some that are inaccurate and simply not up to the task. One tracker that we tested was out by more than 23% when measuring heart rate during our tests.
Our goal is to help you pick a fitness watch or activity tracker that's accurate, as well as comfortable and a breeze to use. You can read more about accuracy in our guide to the most and least accurate fitness trackers and smartwatches.
- Accuracy: our testers run, walk and undertake everyday tasks while we measure how the device tracks steps, distance – based on GPS, if it has in-built GPS, or based on step count if not. We also factor in heart rate. Test participants walk and run routes of known distances, including wooded areas to really challenge GPS trackers.
- Ease of use: our testers spend weeks getting stuck into using the tracker and the accompanying app, so you can be sure they’ll find any niggles when using it.
- Comfort: a fitness tracker could be super-accurate but, if it rubs your skin, digs into your arm or is just plain heavy and ugly, you’re not going to wear it. We get a range of users to assess each device for comfort.
Fitness and activity tracker reviews you can trust
Models from the biggest fitness and activity tracker brands on the market are tested in the Which? test lab – including Fitbit, Garmin, Polar and Samsung. Even the most well-known names occasionally drop the ball.
Which? is independent – we work for you, the consumer, so you can be sure that our product recommendations are influenced only by our test results. We don’t take advertising and we buy all the products that we test ourselves, so our advice helps you to make the right choice first time and avoid costly mistakes.
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