WHOOP · Updated June 2026
WHOOP 4.0: specs & release date
WHOOP 4.0, released 2021-10. Every price and spec below is linked to its source and dated — no guesses.
Source: dcrainmaker.com verified STALE · 2026-06-15 ✓ corroborated verify in ledger
The WHOOP 4.0 has no published US price yet. It earns a Bronze Deskmark — 8/100 pay-blind standing, #20 of 24 in class.
Verified Jun 15, 2026 · figures linked to their source in the table below
- Best for Accurate sleep, recovery, and strain tracking (validated against gold-standard measures in one study, corroborated by consistency checks and accurate strain/recovery predictions); Meaningful, positive impact on users' lifestyle and habits.
- Skip if Ongoing subscription cost is a sticking point for some users/reviewers is a dealbreaker.
Is the WHOOP 4.0 a good buy?
On the spec sheet, its water resistance of 10 m is the lowest of the 24, its release of 2021 is the lowest of the 17, and its battery days of 5 is below the median of the 24. By release date, it is the oldest of the 17 we date.
Evidence of Record
Our data- Independent labsmeasured it
- 2
- Physical metricsrecorded
- 5
- Outlets on record2 tested · 1 mention-only
- 3
Two independent labs measured this product across 5 physical metrics — battery, dimensional accuracy, monthly membership price and 2 more. With a second lab on record, each figure comes from more than one independent hands-on source — a measure of how much evidence exists, not a rating of the product.
battery · dimensional accuracy · monthly membership price · yearly membership msrp · overall rating
Review consensus · sourced & dated
What reviewers say about the WHOOP 4.0
Across 3 testing outlets, the Whoop 4.0 earns a consistently positive verdict, with GearJunkie scoring it 8.0/10. Reviewers converge on its accuracy for sleep, strain, and recovery tracking and its tangible impact on users' daily habits, while the recurring subscription cost (up to $30/month, or $239/year) is the main friction point raised. Battery life is reported consistently at around 4 to 5 days across sources.
Based on 3 reviews · 3 lab-tested · 2022-11-24–2025-06-25
Tested by Gadgets & Wearables, GearJunkie, TechBuzz Ireland
Consistently praised
- Accurate sleep, recovery, and strain tracking (validated against gold-standard measures in one study, corroborated by consistency checks and accurate strain/recovery predictions) · 3 sources
- Meaningful, positive impact on users' lifestyle and habits · 2 sources
- Consistent readings when compared against other wearables
Commonly flagged
- Ongoing subscription cost is a sticking point for some users/reviewers · 2 sources
The sources (3)
Battery life: 4 to 5 days · Sleep tracking accuracy (all epochs correctly identified): 86% · Monthly membership price (top tier): $30 per month
WHOOP says battery life is somewhere between 4 and 5 days.
All in all, the wearable correctly identified 90% of sleep epochs, 56% of wake epochs and 86% of all epochs.
Researchers concluded that WHOOP had 99% accuracy for both metrics as compared to the gold standard.
Battery life: about 4 days · Yearly membership MSRP: $239 · Overall rating: 8.0/10
I felt that Whoop 4.0 accurately calculated the relative strain of aerobic exercise and predicted sleep and recovery needs.
The on-board battery lasted about 4 days and was recharged wirelessly with a clever piggyback battery pack.
The impact on my lifestyle that the Whoop 4.0 had in the beginning is undeniable.
I did compare some factors with several watches to WHOOP to see how consistent it was and it indeed was consistent.
I have noticed more and more people wearing WHOOP over the last few months and have actually stopped some and asked how they feel about it and it is all positive bar the price with some.
For me with what this offers it is the only tech product that has changed me in several ways and for the better.
Specifications
| Price (US) | Not published No up-front hardware cost. Requires active WHOOP membership: previously $30/month (monthly) or ~$199/year (One tier annual). WHOOP 4.0 hardware bundled with membership; exact current MSRP not applicable as device is sold only with subscription. priceUsd set null — subscription-only model. |
|---|---|
| Brand | WHOOP |
| Released | 2021-10 |
| Form factor | band |
| Display | — |
| Battery days | 5 |
| Gps | No |
| Spo2 | Yes |
| Ecg | No |
| Subscription required | Yes |
| Water resistance (m) | 10 |
Source: dcrainmaker.com (read 2026-06-15) STALE · 2026-06-15 · corroborated by en.wikipedia.org (read 2026-06-15). Battery 5 days confirmed via search results (WHOOP 4.0 vs 5.0 comparison). No display (screenless band). SpO2 yes, ECG no (ECG is WHOOP MG/Life-tier only per Wikipedia and WHOOP site). Water resistance IP68 / 10m confirmed via search results (thewearify.com, techloved.com). Subscription required — device non-functional without membership. Release Oct 2021 from DC Rainmaker review URL and Wikipedia. No GPS confirmed; no built-in GPS chip.
Frequently asked questions
What do reviewers say about the WHOOP 4.0?
Across 3 testing outlets, the Whoop 4.0 earns a consistently positive verdict, with GearJunkie scoring it 8.0/10. Reviewers converge on its accuracy for sleep, strain, and recovery tracking and its tangible impact on users' daily habits, while the recurring subscription cost (up to $30/month, or $239/year) is the main friction point raised. Battery life is reported consistently at around 4 to 5 days across sources. Praised: Accurate sleep, recovery, and strain tracking (validated against gold-standard measures in one study, corroborated by consistency checks and accurate strain/recovery predictions); Meaningful, positive impact on users' lifestyle and habits; Consistent readings when compared against other wearables. Flagged: Ongoing subscription cost is a sticking point for some users/reviewers. (From 3 tester reviews, 3 lab-tested.)
How much does the WHOOP 4.0 cost?
The WHOOP 4.0 has no published US price as of 2026-06-15.
When was the WHOOP 4.0 released?
The WHOOP 4.0 was released 2021-10.
What are the WHOOP 4.0's key specs?
WHOOP 4.0 (WHOOP): form factor band, battery days 5, gps No, spo2 Yes, ecg No. Full sourced spec sheet verified 2026-06-15.
Similar fitness trackers
Nearest in price — swipe to browse. Every pick sourced and dated.
All fitness trackers ranked · Open data & methodology · Queryable via MCP
Compare with
Head-to-head
More from WHOOP
Part of the Wearables cluster
What you put on your wrist, face and finger. Same sourcing, same dated prices: