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Consumer flagship · Band / strap · by Fitbit
Fitbit Charge 6 / Sense 2
Cleared ECG and AFib, but the insight and your own export sit behind Fitbit Premium.
October 2023Fitbit Charge 6
Maturing2 yr 8 mo old
API access: Yes — restricted Raw data access: Yes — restricted Open source: Community
Clinical value
58/100
Cleared ECG/AFib, limited depth
Empowerment
40/100
Premium paywall + Takeout-only
Everyday value
68/100
Light and simple, ~7-day battery
Cleared ECG and AFib detection, but much of the analytic value — and the easiest way to export your own data — sits behind a subscription, inside a Google account you were migrated into.
What it measures
HR, HRV, ECG, SpO2 (relative/trend), skin temperature, sleep stages, respiratory rate, EDA stress (Sense 2), Daily Readiness, cardio fitness.
Regulatory status
FDA-cleared single-lead ECG and AFib/irregular-rhythm notifications (Google-validated PPG). SpO2, temperature, and EDA are wellness-only. No sleep-apnea or BP clearance.
Validation & accuracy
AFib PPG algorithm validated at ~98% detection in a large Google-sponsored study. SpO2 subject to consumer skin-tone bias concerns.
Data control & export
A notable weak point: after the forced Google migration, export is via Google Takeout (full-archive JSON, no granular selection). In-app detailed wellness reports require Premium. ECG exports a report/PDF.
Wearability & battery
Slim, light wrist band (Charge) or basic smartwatch (Sense 2). ~7-day battery — easy to live with. Limited smartwatch breadth beyond health and fitness.
Cost & access
Fitbit Premium $9.99/mo or $79.99/yr paywalls Daily Readiness, detailed Sleep Profile, stress depth, the AI coach, and the 12-month exportable reports. Core ECG/AFib/HR are free.
Who it serves
Now a Google product requiring a Google account (legacy Fitbit accounts were shut down); subscription lock-in plus Takeout-only export are the main agency red flags.
Who is left out or burdened
Google account required; depth and granular export gated behind Premium; SpO2 skin-tone concerns.
✓ Strengths
- FDA-cleared ECG and AFib/irregular-rhythm notifications
- Light, comfortable, ~7-day battery
- Approachable for first-time trackers
✕ Weaknesses
- Premium paywalls insight and the exportable reports
- Requires a Google account (legacy accounts shut down)
- Export is Takeout full-archive JSON only
- SpO2 wellness-only; narrow cleared feature set
58
Why this clinical score. Cleared ECG and AFib are real, but the cleared-feature set is narrower and shallower than the flagship watches.
40
Why this empowerment score. Premium paywall over insight and exports, forced Google-account migration, and full-archive-only Takeout make this one of the more locked-in consumer devices.
68
Why this everyday score. Light, comfortable, and a relaxed ~7-day battery, but it does less day-to-day than a full smartwatch.
Latest news
Reviews & coverage
Long a favorite for approachable health tracking, reviewers praise the sleep scores, stress (EDA) tools and multi-day battery on Charge/Sense. The main complaints are that the most useful insights sit behind Fitbit Premium and that the Google transition has unsettled some longtime users.
Summary is a draft synthesis of public coverage, not an endorsement. Links open a search of each outlet.
Reddit communities
Independent user communities where this device (or its category) is discussed.
Get it · manuals & support
Draft profile · public-source review, June 2026 · scores describe direction and degree, not buying advice. News, links, and prices change — verify with the manufacturer. Image is representative.