Fitness Trackers / Fitbit Charge 6 (2023) vs Withings ScanWatch Light (37mm)
Fitbit Charge 6 (2023) vs Withings ScanWatch Light (37mm)
Fitbit Charge 6 (2023)
The only Fitbit band with real GPS — but the best metrics are a $99.99/year rental.
Wins overall by 1.1 points
Quick Verdict
A 1.1-point gap makes the Fitbit Charge 6 (2023) the straightforward choice here. The only Fitbit band with real GPS — but the best metrics are a $99.99/year rental.
The Fitbit Charge 6 (2023) and Withings ScanWatch Light (37mm) are both closely matched fitness Tracker models, and the Fitbit Charge 6 (2023) is $90 cheaper than the Withings ScanWatch Light (37mm) ($159.95 vs $249.95). On Phone Independence, the Fitbit Charge 6 (2023) leads (8.5 vs 2.0/10) — how much the device can do with the phone left at home — a real GPS chip and on-wrist readouts score high, connected-GPS screenless bands score low.. On Subscription Freedom, the Withings ScanWatch Light (37mm) leads (8.0 vs 5.0/10) — the category's trap dimension: how much of what you paid for keeps working without a membership. A 10 means nothing is paywalled; a 1 means the hardware is unusable the moment you stop paying.. On Battery Life, the Withings ScanWatch Light (37mm) leads (9.5 vs 6.5/10) — real endurance once continuous heart rate, SpO2 and the always-on display are enabled, not just the headline figure.. Overall, the Fitbit Charge 6 (2023) scores 7.4/10 across our 8 scoring categories versus 6.3/10 for the Withings ScanWatch Light (37mm). Below, we break down the full spec sheet, category-by-category scores, and exactly who should buy which one.
Side-by-Side Comparison
| Spec | Fitbit Charge 6 (2023) | Withings ScanWatch Light (37mm) |
|---|---|---|
| Price | $159.95 | $249.95 |
| Release Year | 2023 | 2024 |
| GPS | Built-in GPS + GLONASS — works with the phone left at home | Connected GPS at best — the Amazon listing advertises 'Connected GPS' using the phone, while Withings' own shop spec sheet does not list GPS at all. Sources conflict; either way there is no GPS chip in the watch |
| Display | AMOLED colour touchscreen under Gorilla Glass 3, with optional always-on mode | Analogue hands plus a 0.63-inch grayscale OLED sub-display (282 PPI) |
| Rated Battery Life ( days) | 7 | 30✓ |
| What the Battery Claim Assumes | Google's 'up to 7 days' assumes the always-on display OFF and SpO2 off; the spec sheet states both 'will require more frequent charging'. Full charge takes ~2 hours | Sources conflict: Withings' own shop page claims up to 35 days, while the Amazon listing title and launch coverage say 30 days. No SpO2 sensor is drawing power |
| Subscription Model | Optional in name, heavy in practice — Daily Readiness Score, the Sleep Score breakdown, the detailed Stress Management breakdown and the workout library all sit behind Google Health Premium. 3 months included | Optional — Withings+ adds cardiologist ECG review, the AI Health Assistant, NutriCare and Readiness scoring. One month is included. Withings does not publish the Withings+ price on its US product or subscription pages |
| Annual Subscription Cost ($) | 99.99 | Not published on Withings' US Withings+ page |
| Water Resistance | 5 ATM / 50 m to ISO 22810:2010 — Google notes water resistance 'decreases or is lost over time' | 5 ATM / 50 m, swimproof |
| ECG / AFib & FDA Status | ECG app via multipurpose electrical sensors plus PPG irregular-rhythm notifications. Fitbit's ECG feature is FDA-cleared in the US; Google's current Charge 6 spec sheet does not restate the clearance | No ECG on the Light — Withings reserves ECG and AFib detection for ScanWatch 2 and Nova. The cardiologist ECG review sold under Withings+ therefore does not apply to this model |
| SpO2 Sensor | Yes — red and infrared sensors, overnight SpO2 | No — Withings explicitly omits the SpO2 sensor on the Light |
| Phone Compatibility | iOS 16.4+ or Android 11+, and setup requires a Google account | iOS and Android via Withings Health Mate |
| Charger | Proprietary magnetic cable shared with Charge 5 and Luxe; Google sells it as a standalone accessory (the Google Store listing did not render a price when checked) | Proprietary magnetic puck |
| Data Export | Google Takeout export of the Google Health/Fitbit archive (JSON and CSV bundles) | Health Mate offers a full account data export in CSV, and Withings publishes a developer API |
| Warranty | 12 months | 24 months |
| Colors | Obsidian / Black Aluminum, Porcelain / Silver Aluminum, Coral / Champagne Gold Aluminum | Black & Silver, White & Rose Gold, Green, Blue |
Category Scores
Tracking Accuracy
The Fitbit Charge 6 (2023) leads clearly here, 8.0 against 7.0 — a 1.0-point margin on how closely steps, heart rate and sleep match reference devices — and how badly the optical sensor falls apart at high intensity.. If that is what you are buying for, the Withings ScanWatch Light (37mm) does not close the gap elsewhere.
Subscription Freedom
The Withings ScanWatch Light (37mm) leads clearly here, 8.0 against 5.0 — a 3.0-point margin on the category's trap dimension: how much of what you paid for keeps working without a membership. A 10 means nothing is paywalled; a 1 means the hardware is unusable the moment you stop paying.. If that is what you are buying for, the Fitbit Charge 6 (2023) does not close the gap elsewhere.
Phone Independence
The Fitbit Charge 6 (2023) leads clearly here, 8.5 against 2.0 — a 6.5-point margin on how much the device can do with the phone left at home — a real GPS chip and on-wrist readouts score high, connected-GPS screenless bands score low.. If that is what you are buying for, the Withings ScanWatch Light (37mm) does not close the gap elsewhere.
Battery Life
The Withings ScanWatch Light (37mm) leads clearly here, 9.5 against 6.5 — a 3.0-point margin on real endurance once continuous heart rate, SpO2 and the always-on display are enabled, not just the headline figure.. If that is what you are buying for, the Fitbit Charge 6 (2023) does not close the gap elsewhere.
Display & Usability
The Fitbit Charge 6 (2023) leads clearly here, 8.0 against 5.0 — a 3.0-point margin on screen size, brightness and how much you can actually read on the wrist mid-workout.. If that is what you are buying for, the Withings ScanWatch Light (37mm) does not close the gap elsewhere.
Health Features
The Fitbit Charge 6 (2023) leads clearly here, 8.5 against 5.5 — a 3.0-point margin on depth of the health sensor suite and how much of it is FDA-cleared and enabled in the US.. If that is what you are buying for, the Withings ScanWatch Light (37mm) does not close the gap elsewhere.
App & Data Portability
The Fitbit Charge 6 (2023) and Withings ScanWatch Light (37mm) are level here, at 8.0/10 each. quality of the companion app and whether you can get your own data out in a documented format. is not what separates these two — look to the categories where the scores diverge.
Value
The Fitbit Charge 6 (2023) leads clearly here, 7.0 against 5.5 — a 1.5-point margin on what the first year genuinely costs — purchase price plus any subscription needed for the advertised features.. If that is what you are buying for, the Withings ScanWatch Light (37mm) does not close the gap elsewhere.
Best For
Choose the Fitbit Charge 6 (2023) if…
- • Phone Independence matters most to you — the Fitbit Charge 6 (2023) scores 8.5/10 here (how much the device can do with the phone left at home — a real GPS chip and on-wrist readouts score high, connected-GPS screenless bands score low.).
- • Display & Usability matters most to you — the Fitbit Charge 6 (2023) scores 8.0/10 here (screen size, brightness and how much you can actually read on the wrist mid-workout.).
- • Health Features matters most to you — the Fitbit Charge 6 (2023) scores 8.5/10 here (depth of the health sensor suite and how much of it is FDA-cleared and enabled in the US.).
- • You want to spend less — it's $90 cheaper.
- • Your main use case is built-in-gps.
Choose the Withings ScanWatch Light (37mm) if…
- • Subscription Freedom matters most to you — the Withings ScanWatch Light (37mm) scores 8.0/10 here (the category's trap dimension: how much of what you paid for keeps working without a membership. A 10 means nothing is paywalled; a 1 means the hardware is unusable the moment you stop paying.).
- • Battery Life matters most to you — the Withings ScanWatch Light (37mm) scores 9.5/10 here (real endurance once continuous heart rate, SpO2 and the always-on display are enabled, not just the headline figure.).
- • Your main use case is no-subscription.
Pros & Cons
Fitbit Charge 6 (2023)
Pros
- +Genuine built-in GPS — the single spec that separates it from every other Fitbit band
- +Bluetooth heart-rate broadcast to treadmills, bikes and Peloton is rare at this price
- +Both S and L bands ship in the box rather than being a $30 upsell
- +ECG and EDA electrodes give it health hardware the cheaper bands physically lack
Cons
- −Daily Readiness Score and the useful half of the sleep analysis are Google Health Premium features — $99.99/year once the 3-month trial lapses, up from Fitbit Premium's old $79.99
- −The 7-day figure assumes always-on display and SpO2 both off; turn either on and Google itself says to expect less
- −A Google account is mandatory to set the tracker up at all
- −Proprietary charging cable that fits only Charge 5, Charge 6 and Luxe
- −Wrist optical HR degrades badly above ~150bpm — peer-reviewed testing found Fitbit units underestimate HR during intense intervals
Withings ScanWatch Light (37mm)
Pros
- +A month or more per charge, by far the longest run time in this comparison
- +Stainless steel and real analogue hands — it passes as a watch, not a fitness band
- +CSV account export and a public API make your data genuinely portable
- +Two-year warranty and HSA/FSA eligibility
Cons
- −$249.95 buys no ECG, no SpO2 and no GPS chip — the 'Light' name is doing a lot of work
- −Sources conflict on both battery life (30 vs 35 days) and whether connected GPS is supported at all
- −The Withings+ features most people want, including cardiologist ECG review, need hardware this model does not have
- −Withings does not publish the Withings+ price on its US pages, so the real cost of ownership is unclear at purchase
- −The 0.63-inch grayscale sub-display shows very little at a glance
Shop by Need
FAQs
Is the Fitbit Charge 6 (2023) or Withings ScanWatch Light (37mm) better overall?+
Based on our 8-category scoring, the Fitbit Charge 6 (2023) comes out ahead overall. See the full breakdown in the scores section above — the right pick still depends on which categories matter most for your use case.
Which is better for Phone Independence, the Fitbit Charge 6 (2023) or the Withings ScanWatch Light (37mm)?+
The Fitbit Charge 6 (2023) scores higher on Phone Independence (8.5/10 vs 2.0/10) — how much the device can do with the phone left at home — a real GPS chip and on-wrist readouts score high, connected-GPS screenless bands score low..
Which is better for Subscription Freedom, the Fitbit Charge 6 (2023) or the Withings ScanWatch Light (37mm)?+
The Withings ScanWatch Light (37mm) scores higher on Subscription Freedom (8.0/10 vs 5.0/10) — the category's trap dimension: how much of what you paid for keeps working without a membership. A 10 means nothing is paywalled; a 1 means the hardware is unusable the moment you stop paying..
Which is better for Battery Life, the Fitbit Charge 6 (2023) or the Withings ScanWatch Light (37mm)?+
The Withings ScanWatch Light (37mm) scores higher on Battery Life (9.5/10 vs 6.5/10) — real endurance once continuous heart rate, SpO2 and the always-on display are enabled, not just the headline figure..
Which is better for Display & Usability, the Fitbit Charge 6 (2023) or the Withings ScanWatch Light (37mm)?+
The Fitbit Charge 6 (2023) scores higher on Display & Usability (8.0/10 vs 5.0/10) — screen size, brightness and how much you can actually read on the wrist mid-workout..
Is the Fitbit Charge 6 (2023) worth the price difference over the Withings ScanWatch Light (37mm)?+
The Fitbit Charge 6 (2023) is the cheaper option at $159.95 versus $249.95. Whether the pricier model is "worth it" depends on how much you value its lead in Phone Independence.
Which is better suited to my use case?+
The Fitbit Charge 6 (2023) is the better fit if you mainly care about built-in-gps. The Withings ScanWatch Light (37mm) is the better fit for no-subscription.
What's the warranty on the Fitbit Charge 6 (2023) vs the Withings ScanWatch Light (37mm)?+
The Fitbit Charge 6 (2023) ships with a 12-month warranty; the Withings ScanWatch Light (37mm) ships with a 24-month warranty. Always confirm current terms on the manufacturer's site before buying.
Should I wait for the next model instead of buying either of these?+
If either model is more than two years old, a successor may be close — check the "Latest Model" link on each product page. Otherwise, both are current, well-supported options and there's no strong reason to wait.
Cheaper Option
Polar Loop (2025) — $199.99
Specifications and prices for both products last verified . Scores are calculated from published specifications — see how we compare products.