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Garmin Forerunner 645 Music review

Key features
  • Fitness watch
  • Built-in heart rate monitor
Reviewed

The Garmin 645 Music is a GPS fitness watch that you can store 500 songs on. This may be music to the ears of those who like a beat while running, but is it enough to make this expensive fitness watch worth snapping up? We challenged it in on the treadmill, on a woodland run and in the pool. We reveal all in our full review.

Included in our expert review
  • Pros and cons
  • What is it?
  • What can it do?
  • What's the setup like?
  • What's it like to wear and use?
  • How accurate is it?
  • Is there anything else I should know?
  • Should I buy it?
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Technical specifications

Launched

Test results

The overall Which? test score is made up of the following star ratings, all determined by our rigorous lab tests.

Find out how we test fitness watches and activity trackers
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Compare retailers

Price updated daily

Prices are ordered from lowest to highest, irrespective of retailer rating, delivery price or stock. We are not able to show every possible online retailer and do not include high street only retailers.

RetailerRetailer ratingPriceDeliveryIn stock
The Watch Agency UK
Not rated
£329.11£12.80
Go to store
Evans Cycles
Not rated
£332.00Free
Go to store

The retailers shown are supplied by PriceRunner.co.uk. This may not include every retailer selling the product online. When a retailer link is followed we receive a payment from PriceRunner, irrespective of whether a purchase is made.

Which? is a participant in the Amazon EU Associates Programme, an affiliate programme designed to provide a means for sites to earn affiliate fees by linking to Amazon.co.uk. For products subsequently purchased via Amazon, we receive a payment from them rather than from PriceRunner.

Make smarter choices

We have tested 61 fitness watches and activity trackers and found that there are 1 Don't Buys and 14 Best Buys.
Range of Fitness watches and activity tracker scores
  1. 41%
    Lowest score
  2. 63%
    Average score
  3. 77%
    Highest score
We'll show you where this model sits on the scale so that you can see how it compares to fitness watches and activity trackers we've tested
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You can cancel at any time

Put us to the test

Our Test Labs compare features and prices on a range of products. Try Which? to unlock our reviews. You'll instantly be able to compare our test scores, so you can make sure you don't get stuck with a Don't Buy.

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