WHOOP MG Review 2026: $359 Price, FDA-Cleared ECG, HSA/FSA Status

WHOOP’s “medical grade” strap adds an FDA-cleared ECG and blood pressure insights to the familiar recovery and sleep tracking. Earlier WHOOP straps measure overnight heart rate well, but no study has tested the MG itself, and its blood pressure feature drew an FDA warning letter before regulators stepped back.

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WHOOP unveiled the WHOOP 5.0 and WHOOP MG in May 2025 as new devices with health and longevity features (Business Wire), and Business Today reported that the MG added on-demand ECG and blood pressure tracking (Business Today). CNBC reported 14-day battery life for both straps (CNBC), while TechRadar wrote that the best features sit behind a paywall of three new subscription tiers (TechRadar). This review looks past the launch to what WHOOP’s sensors have been shown to measure in published studies.

First look. No peer-reviewed study has tested the WHOOP MG itself yet; a PubMed search on October 28, 2026 found none. The accuracy section draws on independent studies of earlier WHOOP straps (WHOOP 3.0 and 4.0) that use WHOOP’s optical heart rate approach, and the MG’s new hardware may perform better or simply differently. We found no published study of the MG’s ECG or blood pressure features.

What Is the WHOOP MG?

The WHOOP MG is a screenless wrist strap from WHOOP that tracks heart rate, heart rate variability, sleep, strain and recovery, records an ECG on demand, and offers blood pressure insights, all delivered through a paid membership rather than a one-time purchase. MG stands for medical grade, and it sits above the WHOOP 5.0 in WHOOP’s lineup.

The MG comes with WHOOP’s Life membership, as retailer listings for the “Life 12-month membership, MG device” show (PriceHistory). Engadget asked why anyone would pay $359 for that most expensive membership (Engadget), and Bloomberg’s launch review put the starting subscription at $199 (Bloomberg). Wareable has a guide to which membership fits whom (Wareable). Those figures come from the publications’ headlines and listings and were not tested by Healthcare Discovery.

Reviews are mixed. TechRadar wrote that the super-premium option falls flat at this price (TechRadar), and T3 wore it for a month and listed highs and lows (T3). Outside described it as a fitness tracker that meets medical grade monitoring (Outside), and EFTM praised its detailed health and performance metrics (EFTM).

How Does the WHOOP MG Work?

Like earlier WHOOP straps, the MG reads the body mainly through light and motion. An optical sensor tracks each pulse for heart rate and heart rate variability, and an accelerometer tracks movement and sleep. WHOOP turns those signals into daily recovery, strain and sleep scores. The MG adds an on-demand ECG.

Wearable ECGs generally work by having you touch the device to close an electrical circuit across your body, which records a short tracing of the heart’s electrical activity. That is a spot check you start yourself, not continuous rhythm monitoring, and a tracing you can save is most useful when you show it to a clinician.

Blood Pressure Insights estimate trends from the pulse wave rather than from a cuff, and WHOOP has positioned them as wellness information. FDA disagreed and sent WHOOP a warning letter in July 2025 (FDA); CNBC reported that WHOOP said FDA was overstepping its authority (CNBC). In 2026, MDDI reported that FDA backed down on the dispute (MDDI), Bloomberg Government reported that FDA dropped its complaint (Bloomberg Government), and MassDevice reported that FDA closed the warning letter (MassDevice). Closing the letter is not a clearance: the feature still has no FDA review of its accuracy.

How Accurate Is the WHOOP MG? What the Research Shows

No study has tested the MG yet. Earlier WHOOP straps measured overnight resting heart rate and heart rate variability with moderate agreement against ECG, measured total sleep time within about 14 minutes on average, and matched lab sleep stages about 60 percent of the time. Heart rate during rapid changes in effort was weaker, and the ECG and blood pressure features have no published accuracy data.

Overnight resting heart rate and heart rate variability. In 13 healthy adults tracked against an ECG over 536 nights, the WHOOP 4.0 showed moderate agreement for resting heart rate, a concordance of 0.91 and a mean absolute percentage error of 3.00 percent, and for heart rate variability, a concordance of 0.94 and an error of 8.17 percent. Oura rings did better in the same study, and Garmin and Polar watches worse (PMID 40834291). An earlier Australian study across 15 recordings found heart rate bias of 0.39 percent or less, while heart rate variability bias of 1.66 percent, with limits of agreement of plus or minus 5.93 percent, approached or exceeded the smallest meaningful change, so small day-to-day shifts should be read with care (PMID 34065516).

Heart rate during exercise. In a 2025 study against a 12-lead ECG, the WHOOP 4.0 performed acceptably at steady states but was less accurate during transitions, when heart rate changed quickly (PMID 41157371). In another 2025 study of 28 adults, identical WHOOP 4.0 straps were more accurate on the upper arm than on the wrist, and accuracy fell for every device during burpees, with concordance below 0.50 (PMID 41516615).

Sleep. In 32 healthy adults compared with polysomnography, a WHOOP strap measured sleep duration with a 13.8 minute bias and 17.8 minute precision error, with intraclass correlations of 0.74 for REM sleep and 0.85 for slow wave sleep (PMID 32043961). In 53 adults in a sleep lab, a WHOOP 3.0 told sleep from wake with 86 percent agreement but matched specific sleep stages only 60 percent of the time, a kappa of 0.44 (PMID 36016077). A 2025 study of 62 adults that included the WHOOP 4.0 found every device caught more than 90 percent of sleep but only 29.39 to 52.15 percent of wake, with kappas of 0.21 to 0.53 across devices (PMID 40303381).

ECG and atrial fibrillation. We found a published protocol for a Yale study of WHOOP’s arrhythmia notification algorithm against an ECG patch (PMID 38830741), but no published results, and no peer-reviewed study of the MG’s ECG accuracy, as of October 28, 2026.

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Blood pressure. We found no peer-reviewed validation of WHOOP’s Blood Pressure Insights on PubMed as of October 28, 2026. A 2026 commentary in the Journal of Medical Internet Research looked at lessons from WHOOP’s FDA warning letter (PMID 41563721).

Company ties: the arrhythmia notification protocol lists two WHOOP employees among its authors (PMID 38830741). The other studies list academic, hospital or government research affiliations only. PubMed affiliations are not a full disclosure of funding or conflicts.

What the WHOOP MG Gets Right

The MG gets the basics of overnight tracking right: resting heart rate and heart rate variability with moderate accuracy in independent tests of earlier straps, good total sleep time, an FDA-cleared ECG for checking atrial fibrillation, and a reported 14-day battery.

Solid overnight heart data. A 3.00 percent resting heart rate error and a heart rate variability concordance of 0.94 on the WHOOP 4.0 (PMID 40834291) are good enough for trend tracking, which is what recovery scores depend on.

An FDA-cleared ECG. The WHOOP ECG Feature is listed under 510(k) K243236 (FDA). When you feel palpitations, a tracing you can show your clinician is more useful than a score.

Battery that supports steady wear. CNBC reported 14-day battery life (CNBC), and a screenless strap is easy to wear to bed every night.

Where the WHOOP MG Falls Short

The weaknesses are a costly membership with no way to own the device outright, blood pressure insights without clearance or validation, sleep stages that are only moderately accurate, weaker heart rate during fast changes in effort, and no independent data on the MG itself.

Blood pressure is unvalidated. FDA warned WHOOP about the feature (FDA) and later stepped back, but no study shows how close it comes to a cuff. Use a validated upper-arm cuff for any blood pressure decision.

Sleep stages are estimates. Stage agreement of about 60 percent on a WHOOP 3.0 (PMID 36016077) means deep and REM sleep numbers are best used for long-term trends.

Workout heart rate lags. Errors grow when heart rate changes fast (PMID 41157371). Wearing the strap on the upper arm helped in one study (PMID 41516615), and a chest strap is better for intervals.

You pay every year. TechRadar judged that the MG falls flat at its price (TechRadar). Over several years, membership costs add up well beyond a one-time tracker.

New hardware, older evidence. Every accuracy study above tested an earlier WHOOP strap. Until researchers test the MG, its accuracy is inferred, not shown.

WHOOP MG vs WHOOP 5.0 vs Polar Loop vs Amazfit Helio Strap vs Garmin Index Sleep Monitor

The MG and WHOOP 5.0 share WHOOP’s coaching and 14-day battery; the MG adds the cleared ECG and blood pressure insights at the top membership price. Polar, Amazfit and Garmin offer screenless alternatives, which we cover in separate reviews.

Our Polar Loop review and Amazfit Helio Strap review cover the two main screenless rivals, and our Garmin Index Sleep Monitor review covers a band made for sleep. For what sleep and recovery scores can tell you, read our sleep score essay. If blood pressure is your main concern, see our Hilo Core blood pressure wearable page and our heart health evidence review. Every device we track is in our healthtech wearables guide.

How Much Does the WHOOP MG Cost, and Is It HSA or FSA Eligible?

The WHOOP MG comes with the Life membership, which Engadget reported at $359 (Engadget), and it has been discounted: Tom’s Guide reported $60 off on Amazon (Tom’s Guide), Gear Patrol reported a cut to the MG Life membership (Gear Patrol), and Wareable reported an early Black Friday 2026 deal of up to 33 percent off memberships (Wareable). We found no confirmation that a WHOOP membership is HSA or FSA eligible as a standard purchase, and insurance does not cover it as far as we found.

Some plans may accept a wearable with a letter of medical necessity from your clinician, so ask your HSA or FSA administrator before assuming it qualifies. Remember that the price is a recurring membership. Budget too for the follow-up an ECG reading can prompt, such as a clinician-ordered heart monitor.

Who Should Buy the WHOOP MG, and Who Should Skip It?

The MG suits people who already value WHOOP’s recovery and sleep coaching and want an FDA-cleared ECG in the same strap. It is a poor fit for anyone who wants to buy a tracker once, needs reliable blood pressure numbers, or needs a diagnosis.

Good candidates:

• Athletes and active adults who train by recovery and strain scores and want overnight heart rate variability trends.
• People with palpitations who want an on-demand ECG to share with their clinician.
• Anyone who prefers a screenless strap to a smartwatch.

Better served by something else:

• Chest pain, fainting, or a racing heart with shortness of breath: that is an emergency. Call 911; do not wait for a strap.
• People with high blood pressure: use a validated upper-arm cuff and share readings with your clinician rather than relying on WHOOP insights.
• Buyers who would rather not pay a yearly membership: compare the Polar Loop, Amazfit Helio Strap or Garmin Index Sleep Monitor.
• Anyone who wants WHOOP coaching without the ECG: the WHOOP 5.0 on a lower tier costs less.

If an ECG reading or recovery trend sends you looking for a cardiologist or sleep specialist, the Healthcare Discovery doctor directory lists clinicians by state and specialty.

What This Means for You

The WHOOP MG pairs a well-studied approach to overnight heart rate and heart rate variability with an FDA-cleared ECG. That combination is useful for people who want both recovery coaching and a way to check their rhythm. But the MG itself has not been studied, and its blood pressure insights remain unvalidated even after FDA stepped back from its warning.

Use recovery, sleep stage and blood pressure numbers as trends, not verdicts. Buy the MG if the ECG matters to you and you are comfortable paying for the top membership; otherwise the WHOOP 5.0 on a lower membership, or one of the alternatives above, may cover what you need for less.

Compiled by Healthcare Discovery from the cited PubMed studies and WHOOP’s launch materials. Every PMID, study size and result on this page was checked against PubMed on October 28, 2026. Launch, price, specification and review details come from the named publications’ headlines and listings and were not independently tested. This is a first look; no Healthcare Discovery hands-on testing was done.

Sources

1. Dial MB, et al. Validation of nocturnal resting heart rate and heart rate variability in consumer wearables. Physiological Reports, 2025. PMID 40834291
2. Bellenger CR, et al. Wrist-based photoplethysmography assessment of heart rate and heart rate variability: validation of WHOOP. Sensors, 2021. PMID 34065516
3. Van Oost CN, et al. Accuracy of heart rate measurement under transient states: a validation study of wearables for real-life monitoring. Sensors, 2025. PMID 41157371
4. Moghaddam M, et al. Impact of anatomical placement on the accuracy of wearable heart rate monitors during rest and various exercise intensities. Sensors, 2025. PMID 41516615
5. Berryhill S, et al. Effect of wearables on sleep in healthy individuals: a randomized crossover trial and validation study. Journal of Clinical Sleep Medicine, 2020. PMID 32043961
6. Miller DJ, et al. A validation of six wearable devices for estimating sleep, heart rate and heart rate variability in healthy adults. Sensors, 2022. PMID 36016077
7. Schyvens AM, et al. A performance validation of six commercial wrist-worn wearable sleep-tracking devices for sleep stage scoring compared to polysomnography. Sleep Advances, 2025. PMID 40303381
8. Kumar S, et al. Observational study protocol for an arrhythmia notification feature. BMJ Open, 2024. PMID 38830741
9. Karow B. WHOOP, there it is: lessons from WHOOP’s FDA warning letter. Journal of Medical Internet Research, 2026. PMID 41563721
10. Business Wire. WHOOP unveils WHOOP 5.0 and WHOOP MG, powerful new devices with breakthrough health and longevity features, May 2025. Business Wire
11. Business Today. Whoop introduces two new wearables: Whoop 5.0 and Whoop MG with on-demand ECG, blood pressure tracking, May 2025. Business Today
12. CNBC. Whoop launches two new wearables with 14-day battery life, May 2025. CNBC via NBC Miami
13. TechRadar. Whoop unveils two brand new wearables, but their best features are hidden behind a paywall. TechRadar
14. Bloomberg. Review: Whoop 5.0 and Whoop MG add ECG, blood pressure; subscription from $199, May 2025. Bloomberg
15. Engadget. Why would you pay $359 for the most expensive Whoop membership? Engadget
16. Wareable. Whoop 5 vs Whoop MG: which membership, explained. Wareable
17. PriceHistory. WHOOP Life 12-month membership, MG device. PriceHistory
18. TechRadar. Whoop MG review: the super-premium Whoop option falls flat at this price. TechRadar
19. T3. I wore the Whoop MG for a month and these are the highs and lows. T3
20. Outside. Whoop MG review: wearable fitness tracker meets medical grade monitoring. Outside
21. EFTM. Whoop MG review: detailed health and performance metrics with analysis and help like never before, June 2025. EFTM
22. Tom’s Guide. Amazon has slashed the price of Whoop’s most lab-accurate sleep tracker: save $60 on the medical-grade wearable. Tom’s Guide
23. Gear Patrol. Whoop just slashed the price of its best health and fitness tracker. Gear Patrol
24. Wareable. WHOOP early Black Friday deal 2026: save up to 33% on membership. Wareable
25. FDA. 510(k) premarket notification K243236, WHOOP ECG Feature. FDA
26. 510k Database. K243236, cleared traditional 510(k). 510k Database
27. FDA. Warning letter to WHOOP, Inc., July 2025. FDA
28. MobiHealthNews. Whoop receives warning letter from FDA over blood pressure insights. MobiHealthNews
29. CNBC. Whoop says FDA is overstepping its authority with warning about blood pressure feature. CNBC via NBC New York
30. the5krunner. Whoop and FDA 2026: a surprising win for wearable wellness, January 2026. the5krunner
31. MDDI. FDA backs down on Whoop blood pressure monitoring dispute. MDDI
32. Bloomberg Government. FDA drops complaint against Whoop’s blood pressure tracking tool. Bloomberg Government
33. MassDevice. FDA closes warning letter to Whoop over blood pressure feature. MassDevice

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