What you are actually buying.
WHOOP is a membership that includes hardware, rather than a conventional device purchase. The current US lineup lists One at $199 per year, Peak at $239, and Life at $359. WHOOP 5.0 comes with One or Peak; WHOOP MG comes with Life. Both claim 14+ days of battery and use a screenless design intended for continuous wear.
One covers core sleep, strain, recovery, VO₂ max, heart-rate zones, Strength Trainer, coaching, and journal features. Peak adds Healthspan, stress, alerts, and upgraded charging. Life adds WHOOP MG, on-demand ECG, irregular-rhythm features where available, and Blood Pressure Insights.
The regulatory details need two separate sentences.
WHOOP ECG Feature 1.0 is FDA-cleared. The FDA database lists 510(k) K243236, cleared in April 2025 as over-the-counter electrocardiograph software. The clearance summary describes validation for classifying eligible recordings as atrial fibrillation or sinus rhythm. Availability, eligible users, limitations, and instructions still depend on labeling and region.
Blood Pressure Insights is not the same regulatory story. FDA issued a warning letter in July 2025 concerning the feature. After WHOOP modified the product and labeling, a June 2026 letter said FDA did not intend to enforce device requirements for the modified product under its general-wellness approach. WHOOP’s own support material says Blood Pressure Insights is not a medical device and cannot diagnose or manage medical conditions.
An FDA-cleared ECG feature does not make the entire WHOOP MG, its Blood Pressure Insights, recovery score, healthspan estimates, or every optical metric “medical grade.” Each feature needs its own intended use and evidence.
What accuracy evidence exists?
Prior WHOOP generations appear in sleep-validation studies and systematic reviews. A 2025 laboratory comparison included WHOOP 4.0 among six consumer wrist devices and found performance varied by sleep parameter. A 2024 systematic review covering WHOOP, Fitbit, and Garmin emphasized small samples, inconsistent methods, and the need for standardized validation.
For the 5.0 optical sensor itself, direct independent evidence remains sparse. A 2026 research paper using WHOOP 5.0 explicitly noted that the model had not been independently validated, while citing earlier 3.0 evidence. The cleared ECG evidence is feature-specific and should not be used to validate sleep, calories, strain, or recovery.
Where WHOOP’s idea is strongest.
WHOOP’s most interesting value is not one score; it is the relationship between behavior logging and repeated signals. A person can mark alcohol, late meals, travel, or a changed routine and inspect how patterns move. That can generate better questions and more consistent habits.
It can also generate false causal stories. A journal correlation is not a randomized trial, and several behaviors change together. “Alcohol lowered my recovery by 18%” is more precise than the observational design deserves. The correct use is hypothesis generation, followed by repeatable behavior experiments and common sense.
Who should choose which tier?
- You train consistently and want screenless load/recovery context.
- You enjoy detailed behavior journaling and longer trends.
- The annual commitment fits your budget.
- You do not need GPS or live metrics on the device.
- You understand the ECG’s labeled purpose and regional access.
- The added regulated feature solves a real need discussed appropriately.
- You will not treat Blood Pressure Insights as a cuff replacement.
- You accept the $359 recurring annual cost.
The HealthFit decision
For most serious WHOOP buyers, Peak is the coherent package. One saves money but omits features central to WHOOP’s current positioning. Life/MG is not a general “more health” upgrade; it is a premium tier whose ECG value is specific and whose blood-pressure estimates need a very visible wellness boundary.
Buy WHOOP for training and behavior context, not for proof that a recovery score knows your body. Treat the ECG as a separately cleared tool and every other metric according to its own evidence.
Follow the ECG feature’s labeling and seek appropriate care for concerning symptoms or results. Blood Pressure Insights is not a replacement for a validated cuff, diagnosis, or medication management. A “green recovery” cannot clear someone for exercise.