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Consumer flagship · Watch · by Garmin
Garmin Fenix 8
Garmin’s flagship multisport watch — FDA-cleared ECG, dive computer, huge battery, and open data export.
August 2024Garmin Fenix 8
Mid-cycle1 yr 10 mo old
API access: Yes — open Raw data access: Yes — open Open source: Community
Clinical value
52/100
FDA-cleared ECG/AFib
Empowerment
74/100
Open export, cross-platform
Everyday value
82/100
Flagship battery, maps, dive
Garmin’s premium multisport flagship with an FDA-cleared single-lead ECG, a dive computer, class-leading battery, and the same open data export — wellness-only beyond the ECG, at a flagship price.
What it measures
Optical HR, HRV, single-lead ECG, Pulse Ox/SpO2, skin temperature, respiration, Body Battery/stress, advanced sleep, plus a dive computer (to 40m) and a mic/speaker.
Regulatory status
FDA-cleared ECG app (AFib) across all Fenix 8 models in the US. SpO2, temperature, and sleep are wellness-only; no apnea detection.
Validation & accuracy
Same FDA-cleared ECG algorithm as other Garmin Elevate Gen 5 watches; optical HR well regarded, SpO2 wellness-grade.
Data control & export
Raw data: open — FIT/GPX/TCX/CSV export and ECG PDF. API: open — Garmin Health API and Connect IQ.
Wearability & battery
Rugged flagship in multiple sizes with AMOLED or solar MIP displays, class-leading multi-day to multi-week battery, full maps, and dive support. Large and heavy for some wrists.
Cost & access
One-time from ~$999.99 (up to ~$1,199.99). Core features free; optional Connect+ ($6.99/mo).
Who it serves
Endurance and outdoor athletes who want maximum capability plus a cleared ECG and portable data.
Who is left out or burdened
Flagship price; large/heavy; ECG region-gated.
✓ Strengths
- FDA-cleared single-lead ECG (AFib)
- Class-leading battery, full offline maps, dive computer
- Open export (FIT/GPX/TCX/CSV) + ECG PDF and developer API
- Cross-platform and free core data
✕ Weaknesses
- Flagship price (from ~$999)
- Large and heavy for smaller wrists
- ECG region-gated; SpO2 wellness-grade
- No sleep-apnea or BP clearance
52
Why this clinical score. The FDA-cleared ECG/AFib is real, but with no sleep-apnea or BP clearance the clinical score matches the Venu 3.
74
Why this empowerment score. Open formats, developer API, cross-platform, and free core data — the same strong empowerment posture as the rest of Garmin’s line.
82
Why this everyday score. Top-tier everyday capability — class-leading battery, full maps, dive computer — held back only by size and price.
Latest news
Reviews & coverage
Regarded as a top-tier multisport/adventure watch — reviewers praise the rugged build, deep training metrics, mapping and very long battery. The big caveat is the premium price, with some questioning the value of incremental upgrades like the microphone/speaker.
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.