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Fitness Trackers & Smart Scales: Mistakes to Avoid When Buying

By the Nest & Yard editorial teamUpdated 2026-08-094 min read

Our pick: the eufy Smart Scale A1, Bluetooth Digital Bathroom Scale, 12 Measurements — the best Fitness Trackers & Smart Scales we tested, from £14.99.

Thinking about taking your fitness journey to the next level with a smart scale or activity tracker? Many UK shoppers find themselves overwhelmed by the choices available on Amazon UK – devices like the eufy Smart Scale A1, Fitbit Inspire 3, or Xiaomi Smart Band 9 all offer different capabilities. Before you commit to one, it's wise to be aware of potential pitfalls such as incorrectly sizing a smart scale for accurate readings or overlooking hidden costs like battery replacements or subscription fees.

See the full range in Fitness Trackers & Smart Scales.

eufy Smart Scale A1, Bluetooth Digital Bathroom Scale, 12 Measurements
Editor's Choice

#1 Pick

eufy Smart Scale A1, Bluetooth Digital Bathroom Scale, 12 Measurements
Rated 4.5 out of 5 stars (8,342)
  • Bluetooth

£14.99

Pros

  • Tracks 12 key body metrics including weight and BMI
  • Bluetooth sync to the EufyLife app
  • Sleek design fits any bathroom

Cons

  • No WiFi, so pairing is per-session over Bluetooth
View on Amazon →

Pros

  • Up to 10 days battery life
  • Built-in stress management and sleep tracking
  • Lightweight and comfortable for all-day wear

Cons

  • No built-in GPS
Check on Amazon →
XIAOMI Smart Band 9 Fitness Tracker, AMOLED Display

#3 Pick

XIAOMI Smart Band 9 Fitness Tracker, AMOLED Display
Rated 4.3 out of 5 stars (10,664)
  • Bluetooth

Currently unavailable

Pros

  • Bright AMOLED display is easy to read outdoors
  • Long battery life between charges
  • Tracks a wide range of workouts and health metrics

Cons

  • Companion app has fewer features than premium brands
Check on Amazon →
Garmin Forerunner 245 GPS Running Smartwatch with Training and Performance Features

#4 Pick

Garmin Forerunner 245 GPS Running Smartwatch with Training and Performance Features
Rated 4.6 out of 5 stars (4,521)
  • Bluetooth, ANT+, GPS

Currently unavailable

Pros

  • Advanced running dynamics including VO2 max and training effect
  • Built-in GPS with no phone required
  • Up to 7 days battery life in smartwatch mode

Cons

  • No touchscreen, relies on physical buttons
Check on Amazon →

FAQ

I've got a small bedroom – how do I choose the right size fitness tracker display?

Consider the screen dimensions carefully; many trackers have large displays that dominate a room. Prioritise models with compact screens or those featuring dimmable brightness to prevent glare and conserve space.

Some trackers advertise heart rate zones, but I don’t use them – am I paying too much?

Many users won't utilise every feature offered; assess your fitness goals realistically before investing in a tracker with advanced zone tracking. Look for models offering core metrics like step count and sleep data at a lower price point.

My smart scale requires a subscription to access all the data – is this worth it?

Subscription fees can quickly add up, so check if the scale provides sufficient data without one. Some scales offer limited free functionality with no ongoing charges, or consider those with basic weight tracking alone.

I bought a fitness tracker that doesn’t sync with my phone – what's gone wrong?

Ensure your tracker and smartphone are connected to the same Wi-Fi network and that you’ve installed the correct app from the manufacturer’s website or app store.

The fitness tracker keeps losing its connection. Is this normal?

Interference from other electronic devices can disrupt Bluetooth connections; try moving your tracker closer to your phone, or relocate interfering equipment.

I'm trying to track my running – does a fitness tracker with GPS really make a difference?

While most trackers include GPS, accuracy varies depending on signal strength and device placement. Consider dedicated GPS running watches for more precise distance measurements and mapping features.

My smart scale isn’t accurately measuring my weight – what could be the issue?

Ensure you're standing still and not moving while weighing yourself; slight shifts in posture can affect readings, and calibrate regularly if possible.

I’ve bought a fitness tracker that doesn’t fit comfortably on my wrist – how do I find the right size?

Measure your wrist circumference before purchasing, and check the tracker's dimensions to ensure it fits without being too tight or loose. Some brands offer different strap sizes or adjustable designs.

The fitness tracker battery drains incredibly quickly – is this expected?

Battery life depends on usage; frequent GPS use, continuous heart rate monitoring, and bright screen settings significantly impact power consumption. Consider a model with longer battery life for your needs.

I’ve read conflicting reviews about the accuracy of these devices – how can I trust the data?

Understand that fitness trackers are estimates; consult with a healthcare professional before making significant changes to your routine based on tracker data. Focus on trends over time rather than relying on individual readings.

In depth

Buying a fitness tracker or smart scale can seem straightforward – you want something that motivates you to move more and gives you an accurate picture of your weight. However, many UK shoppers stumble when it comes to actually getting the most out of their purchase. It's not just about the device itself; it’s about how you integrate it into your lifestyle and the preparation you undertake beforehand. A common mistake is focusing solely on the technical specifications without considering practical factors that significantly impact usability and long-term satisfaction. Let’s look at some of these pitfalls and, more importantly, what you can do to avoid them.

One of the biggest oversights concerns space considerations. Many people, particularly those in smaller homes or flats, assume that a sleek fitness tracker or smart scale will simply sit on a countertop. This often leads to a device awkwardly crammed into a limited area, becoming an eyesore and making it inconvenient to use regularly. Before purchasing, meticulously measure the available space – not just the length and width of the surface, but also the depth needed for operation and potential cable management. Consider where you’ll place the charging dock too; a tangled mess of cables is far less appealing than a neatly organised setup. If you have a small bathroom or kitchen, opt for a more compact model, and if space isn't an issue, perhaps look at something with larger display screens for easier viewing.

Another frequent error centres around feature overload. Fitness trackers, in particular, are often packed with sensors measuring everything from heart rate variability to sleep stages to stress levels. While these metrics can be valuable for detailed analysis, many users quickly become overwhelmed and lose interest if they aren’t actively utilising them. Before buying, honestly assess your fitness goals. Are you primarily interested in step counting? Do you need advanced sleep tracking for medical reasons? Or are you simply looking to get a basic overview of your activity levels? Resist the urge to pay extra for features you won't actually use; it's far better to invest in a device that excels at its core functions.

Furthermore, many shoppers fail to factor in the ongoing running costs associated with these devices. Fitness trackers require charging – frequently – and smart scales often rely on batteries or Bluetooth connectivity which eventually needs replacing. Consider the cost of replacement batteries (if applicable) and the potential for needing new charging cables over time. Some models also benefit from subscription services unlocking additional data analysis or personalised coaching; factor in the monthly or annual fees before committing to a purchase. Always check the manufacturer's website or the product listing for details on these ongoing costs.

Don’t let impressive headline specifications mislead you. Marketing materials often highlight maximum heart rate ranges, GPS accuracy, or advanced algorithm capabilities – features that may be entirely irrelevant to your needs. For example, a fitness tracker boasting built-in GPS might be overkill if you primarily walk around your local park; a simple step counter will likely suffice. Focus on the core functionality of the device and whether it aligns with your specific requirements. A more basic model offering reliable step tracking and calorie counting can often provide greater value than a premium device loaded with unnecessary bells and whistles.

Finally, remember that the initial purchase is only part of the equation. Smart scales frequently require calibration – a process often overlooked by new users – to ensure accuracy. Follow the manufacturer’s instructions carefully for this crucial step, usually involving weighing yourself in light clothing on a hard surface. Regularly recalibrate your scale according to the manufacturer's recommendations to maintain data integrity. Similarly, consider the type of strap you use with a fitness tracker; different materials can affect heart rate measurements, and ensuring a snug but comfortable fit is vital for accurate readings. Taking these preparatory steps will significantly improve your experience and help you get the most out of your investment.

The Nest & Yard editorial team

Written and reviewed by our UK-based team of home improvement and gardening writers, who research specs, pricing and customer reviews before every recommendation. Reviewed and updated on 2026-08-09.

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