| Factor | Dedicated Fitness Tracker | Smartwatch with Fitness Features |
|---|---|---|
| Battery life | 5-14+ days | 1-3 days |
| Form factor | Light, simple | Full watch face |
| Smart features | Limited | Full (calls, apps, NFC) |
| Health focus | Primary | Secondary (but capable) |
| GPS | Some (may need phone) | Usually built-in |
| Price | £50-300 | £250-1000+ |
| Ecosystem | Brand-specific app | iOS/Android native |
Choose Dedicated Fitness Tracker when…
You want maximum battery life, care primarily about health metrics (steps, sleep, HRV), prefer a lighter device, want a lower price point, or don't need smartphone notifications on your wrist.
Choose Smartwatch with Fitness Features when…
You want full smartwatch functionality alongside health tracking, are in the Apple or Google ecosystem, want GPS, NFC payments and apps, or are willing to charge daily for more features.
Gear for both
Garmin Vivosmart Fitness Tracker
Slim, multi-day battery fitness tracker for daily health monitoring.
Check price on AmazonApple Watch Series 9
The leading smartwatch with full fitness tracking capabilities.
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FAQ
Is Fitbit still worth buying in 2026?
Fitbit trackers (now owned by Google) remain excellent for pure health monitoring — sleep tracking and daily activity are consistently well-rated. For runners and athletes wanting GPS and advanced training metrics, Garmin's fitness trackers are stronger.
Is a fitness tracker accurate for heart rate monitoring?
Optical wrist-based heart rate monitoring (used by both fitness trackers and smartwatches) is generally accurate within 2–5 bpm at steady-state aerobic effort. Accuracy decreases significantly during high-intensity intervals, weight training, and any activity involving wrist flexion. For training zones and intensity work requiring accurate heart rate data, a chest strap (such as Polar H10 or Wahoo TICKR) remains the gold standard.
How accurate are fitness trackers for calorie counting?
Studies consistently show wrist-based fitness trackers have significant error rates for calorie expenditure — typically 10–40% over or under-reporting depending on the device, individual, and activity type. They are most accurate for steady walking and least accurate for cycling, rowing, and weight training. Treat calorie estimates from fitness trackers as useful trends rather than precise measurements.