Whoop 4.0
Fitness Trackers

4.0

Whoop

Released May 1, 2020 · Analysis updated Feb 16, 2026

Whoop 4.0 provides detailed sleep analysis, 24/7 comfort, waterproof design, and 6-day battery life. The Whoop 4.0 scores 80/100 based on 39 expert reviews in the fitness trackers category. Coverage includes reviews from Michaelkummer, Cyclingnews, Telegraph, and Zdnet.

Critic Score

What's this?
80

based on 39 expert reviews

MichaelkummerCyclingnewsTelegraphZdnetConnectthewatts+34 more

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Pros

  • Excellent sleep tracking with detailed analysis(40)
  • Comfortable to wear 24/7(11)
  • Waterproof(8)
  • 6-day battery life(7)
  • Long battery life(5)

Cons

  • No screen(20)
  • Expensive subscription model(15)
  • Requires monthly subscription(9)

39 Expert Reviews

92
Dec 15, 2025

WHOOP gives you detailed insight into your daily strain, recovery, sleep and more, and makes it easy to correlate lifestyle choices (like what you eat) with changes in your health metrics.

90
Jan 14, 2025

A highly specific piece of tech that provides a depth of insight about health and fitness metrics, but which may be wasted on all but the most committed of users

90
Mar 1, 2025

The Whoop 4.0 tracker provides detailed data on fitness performance and recovery, helping users create better habits around sleep and exercise.

90
Dec 16, 2021

The Whoop 4.0 is much more than a detailed sleep tracker, and people who work out regularly will see more benefits than those who lead a sedentary life.

88
Jun 9, 2022

After eight months of testing, the WHOOP 4.0 armband remains the reviewer's preferred wearable due to its accurate health monitoring, valuable recovery insights, and convenient daily journal feature.

87
Nov 24, 2022

WHOOP 4.0 is a screenless, subscription-based wearable that excels at recovery tracking and sleep analysis, offering detailed insights into your body's readiness to perform.

86
Feb 12, 2026

WHOOP 5.0 is a next-gen tracker that focuses on recovery, sleep, and strain levels, offering actionable insights for athletes who demand performance optimization.

85
Jan 14, 2025

After trying it out for a year, I do consider the WHOOP to be well worth it.

85

The reviewer finds WHOOP 4.0 valuable for tracking sleep, recovery, and strain, providing actionable insights that improve awareness of their body's needs.

85
Nov 3, 2022

The WHOOP 4.0 is a comfortable, comprehensive health and fitness tracker that excels at sleep monitoring with personalized recommendations and detailed metrics.

85
Nov 7, 2024

Despite the lack of screen and the less-than-optimal data load times, WHOOP is clearly a superior health tracker.

85
Sep 11, 2024

WHOOP 4.0 is a wearable fitness tracker that offers continuous monitoring of physiological data and provides personalized insights to help you understand and improve your overall health and wellness.

85
Nov 28, 2024

The Whoop 4.0 is a screen-free fitness tracker that excels at comprehensive health monitoring without digital distractions, making it ideal for athletes and fitness enthusiasts focused on performance ...

85
Nov 30, 2021

Whoop 4.0 delivers a host of significant hardware and software upgrades from 3.0. Combined with Whoop Body (garments where the tracker can be placed), Whoop has raised the bar for wearable tech.

85
Jan 6, 2024

The Whoop 4.0 offers excellent fitness tracking for pickleball with accurate activity recognition and deep recovery insights, though its subscription cost and lack of screen may deter some users.

82
Dec 13, 2021

The Whoop 4.0 is a comprehensive fitness tracker that measures sleep, recovery, and strain to help users optimize their performance, though its subscription model and challenging strain scoring may no...

82
Sep 3, 2024

Whoop is a screenless, wrist-worn wearable that tracks your health, workouts, sleep and overnight recovery via a combination of sensors.

82
Feb 5, 2025

The WHOOP 4.0 is a competent, purpose-built fitness tracker that provides comprehensive health metrics with agreeable accuracy, though its lack of display and smartwatch features may not suit everyone...

82
Jan 28, 2022

The WHOOP 4.0 fitness and health tracker gives especially ambitious athletes valuable insights into their own body to optimise training and recovery and to help them reach their full performance poten...

82
Jul 15, 2025

The Whoop MG delivers unprecedented medical-grade health tracking with ECG and blood pressure insights, but its hefty $359/year price tag may be hard to justify for casual users.

82
Mar 25, 2025

The Whoop 4.0 provides excellent in-depth health analysis and sleep tracking, though its constant monitoring may be overwhelming for some users.

82
Jul 31, 2022

The WHOOP 4.0 is a premium fitness tracker designed for fitness enthusiasts focused on making major changes, offering advanced biometrics and strain/recovery tracking.

82
Mar 24, 2025

With some of the best sleep tracking we've come across, the Whoop 4.0 will get you prioritising rest in no time.

82
Jan 14, 2023

The popular fitness wearable earns its stripes helping dedicated athletes improve performance by maximizing recovery.

82
Jun 10, 2025

The Whoop MG refines the screenless formula with advanced metrics like ECG and blood pressure tracking, but it comes at a steep subscription cost.

80
Apr 11, 2025

The Whoop 4.0 is expensive but provides excellent analytics and coaching features that have improved significantly since its initial release.

80
May 21, 2023

Whoop blends into the background, a lifestyle coach designed to feedback on your rest and recovery, guide you to better sleep habits and to make better choices.

80
Jun 6, 2025

Years after its debut, the new Whoop band is still a uniquely designed tracker with distinctive health offerings.

78
Jan 30, 2025

The Whoop 4.0 fitness tracker provides detailed, thorough insights that athletes and runners can use to help set, track, and achieve fitness goals, but it's too complicated and expensive for most casu...

75
Nov 17, 2021

Whoop 4.0 is a substantial leap forward in terms of workout accuracy over Whoop 3.0, but I'm not convinced yet that Whoop has addressed the shortcomings with their recovery algorithm.

75
Dec 30, 2022

The Whoop 4.0 is an excellent fitness tracker, but you'll have to pay high prices to get it.

72
Nov 16, 2022

The Whoop 4.0 is meant to be worn 24/7 and gives athletes extraordinary data on their sleep and recovery, but it's not without its downsides.

70
Mar 2, 2022

For a small subset of wealthy athletes, Whoop is one of the best wearables you can buy, but its $30 monthly subscription and limited features make it hard to recommend for most people.

70
May 4, 2020

WHOOP 4.0 offers a very polished experience for those looking to delve deeper into their training and performance but the lack of screen will put some off.

70
Feb 10, 2026

The Whoop 5.0 delivers excellent battery life, accurate health tracking, and meaningful new insights, though its subscription pricing makes it a costly commitment.

70
Feb 18, 2023

Comfortable, competent, and motivational, the Whoop 4.0 is a great distraction-free fitness tracker, but it doesn't standout against the competition, so fails to justify its high price.

68
Jun 20, 2023

Nechama Katan shares her experience with Whoop 4.0, finding it helpful for recovery tracking but ultimately deciding not to keep it due to cost and existing fitness routines.

60
Aug 17, 2023

The Whoop 4.0 offers detailed fitness insights but is held back by its high subscription cost and limitations in tracking diverse workouts.

50
Feb 15, 2022

Interesting data, but bugs and heart rate accuracy issues take the shine off