Which Fitbit Should You Buy? A Breakdown of Every Model Worth Considering
Fitbit's current range offers something for every budget and fitness goal, but the choice between the Charge 6, Inspire 3, Versa 4, and Sense 2 depends entirely on what you're tracking and how much you want to spend. The Charge 6 at £99.99–£129.95 is the sweet spot for most people — it tracks heart rate, sleep, and exercise without the premium price tag of a full smartwatch. If you want GPS and a larger screen, the Versa 4 at £149.95–£199.99 is worth the extra cost. The Inspire 3 at £99.99 is the budget option, but loses some features. The Sense 2 at £249.95 is only worth it if you want advanced health metrics like ECG and stress tracking.
Why Fitbit?
Fitbit has been the leader in fitness tracking since 2007, now owned by Google, and specialises in wearable health trackers that prioritise accessibility and everyday wearability over flashiness. Their strength is in consistent heart-rate monitoring, sleep analysis, and exercise detection across 40+ workout modes — not in being a smartphone replacement. Unlike Apple Watch or Garmin, Fitbit trackers are light enough to wear 24/7 without discomfort, with battery life ranging from 5–11 days depending on the model. The Fitbit app is straightforward and works on both iOS and Android without requiring a specific phone brand.
Top Picks
Fitbit Charge 6 Advanced Fitness & Health Tracker — £99.99–£129.95
Best for: Most people who want serious health tracking without overcomplicating things.
The Charge 6 is the workhorse of Fitbit's lineup. It has a bright, colour AMOLED screen, 24/7 heart-rate monitoring, sleep tracking with REM and light-sleep detection, and EDA (Electrodermal Activity) stress tracking — features usually reserved for far pricier devices. Battery lasts 5 days between charges. The main trade-off is no built-in GPS (it relies on your phone's GPS if you want mapped runs), but for everyday fitness tracking and health insights, this is where the value sits.
Fitbit Inspire 3 Health & Fitness Tracker — £99.99
Best for: Budget-conscious newcomers to fitness tracking or people who want a minimal daily step counter.
The Inspire 3 is Fitbit's entry point and costs the same as the Charge 6 at its lowest price, but it's a different product. Smaller screen, no stress tracking, no EDA sensor, no colour AMOLED display — just the basics: steps, calories, heart rate, and sleep. Battery lasts 10 days. It's genuinely durable and unobtrusive, but if you can stretch to the Charge 6, the extra sensors justify the cost.
Fitbit Versa 4 Fitness Smartwatch — £149.95–£199.99
Best for: Runners and cyclists who want GPS mapping and a larger, more detailed display.
The Versa 4 is a proper smartwatch with a larger colour touchscreen, built-in GPS (so you can map runs without your phone), and all the health features of the Charge 6. It also handles notifications, music control, and Fitbit Pay for contactless payments. Battery drops to 6 days with heavy GPS use. At £149.95–£199.99, it's the sweet spot for active users. A refurbished version is available at £149.99 if you want to save.
Fitbit Sense 2 Advanced Health & Fitness GPS Smartwatch — £249.95
Best for: Health-conscious users who want ECG, blood oxygen monitoring, and advanced stress analysis.
The Sense 2 is Fitbit's flagship. Beyond GPS and a large AMOLED screen, it adds an ECG app (for detecting irregular heartbeats), SpO2 tracking, temperature sensors, and a dedicated Stress Management Score that shows real-time stress levels. If you have a history of heart issues or prioritise detailed health metrics, this is the only Fitbit worth the premium. Otherwise, the Charge 6 covers 90% of what most people need.
Quick Comparison
| Model | Price | Best For | Standout Feature | |-------|-------|----------|------------------| | Charge 6 | £99.99–£129.95 | All-round health tracking | EDA stress sensor, 5-day battery, AMOLED screen | | Inspire 3 | £99.99 | Budget & simplicity | 10-day battery, lightweight, minimal feature set | | Versa 4 | £149.95–£199.99 | GPS & running | Built-in GPS, larger touchscreen, music control | | Sense 2 | £249.95 | Advanced health metrics | ECG app, SpO2 tracking, temperature sensors |
What to Look For
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Screen type & brightness: AMOLED screens on the Charge 6, Versa 4, and Sense 2 are readable in sunlight; the Inspire 3's monochrome screen is harder to read outdoors. If you're tracking outdoors regularly, budget for a colour display.
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GPS: Built-in GPS on Versa 4 and Sense 2 only. The Charge 6 and Inspire 3 rely on your phone's GPS for mapped workouts. Built-in GPS adds £50–£100 but matters if you run or cycle without your phone.
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Battery life: The Inspire 3 lasts 10 days; Charge 6 lasts 5–7 days; Versa 4 and Sense 2 last 6–8 days depending on GPS use. If charging every week annoys you, the Inspire 3 is the practical choice.
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Health sensors: The Charge 6 has EDA (stress); the Sense 2 adds ECG and SpO2. These matter only if you're tracking specific health conditions. For general fitness, the Charge 6 is complete.
The Bottom Line
Buy the Fitbit Charge 6 at £99.99–£129.95 unless you have a specific reason not to — it's the most versatile and offers the best value across health tracking, screen quality, and daily wearability. If you run or cycle and want GPS without the premium, the Versa 4 at £149.95 is the logical step up. Skip the Inspire 3 unless simplicity is your priority; the Charge 6 costs the same. The Sense 2 is only worth £249.95 if you need ECG and advanced health diagnostics.
Frequently Asked Questions
Is Fitbit good value for money compared to Apple Watch or Garmin?
Fitbit excels at everyday health tracking and battery life (5–10 days vs Apple Watch's 1 day) at a lower price point. Apple Watch is better if you need app ecosystem and phone notifications; Garmin is better for serious runners. Fitbit is the best choice for 24/7 comfort and simplicity without breaking the bank.
Which Fitbit has the longest battery life?
The Inspire 3 lasts 10 days between charges, the longest of any current Fitbit model. The Charge 6, Versa 4, and Sense 2 last 5–8 days depending on GPS and display use. If battery anxiety matters to you, the Inspire 3 or Charge 6 are the practical choices.
Can I use Fitbit for swimming and water sports?
Yes — all current Fitbit models (Charge 6, Inspire 3, Versa 4, Sense 2) are water-resistant to 50 metres, which covers swimming and snorkelling but not diving. The trackers will survive splashes, showers, and pool workouts.
Does Fitbit track sleep accurately?
Fitbit's sleep tracking is reliable for detecting when you're asleep and awake, and the Charge 6 and above also break down REM and light-sleep stages. It's less accurate than polysomnography (lab sleep studies) but good enough for spotting trends. Wear it consistently on the same wrist for best results.
