Whoop 4.0

An image of the Whoop 4.0 in blue

We test and review fitness products based on an independent, multi-point methodology. If you use our links to purchase something, we may earn a commission. Read our disclosures.


  • Fitness tracker without display
  • Whoop app delivers data
  • Tracks blood oxygen, skin temperature, and heart rate
  • Also tracks sleep metrics
Manufacturer: Categories: , ,

In-Depth Review

Whoop 4.0 Review (2024): The Best Fitness Tracker Out There?

Whoop 4.0 Review (2024): The Best Fitness Tracker Out There?

Read the full review.

Pros & Cons

What we like ...
  • 24/7 physiological data available
  • Offers more in-depth metrics than most other fitness trackers
  • Comes with a “coaching” feature to tell you when to train and when to rest
  • Comfortable to wear
  • App is user-friendly
What needs improvement ...
  • Monthly membership fee required
  • No step counter
  • No watch face or display

Product Summary

The Whoop 4.0 fitness tracker is designed to capture your key vital signs—blood oxygen, skin temperature, heart rate, sleep quality and more—continuously. Smaller than its predecessor, the Whoop 3.0, by 33%, but fitted with a more powerful sensor, the Whoop 4.0 has a four- to five-day battery life, Bluetooth capability, and is waterproof up to 10 meters. 

Simply download the compatible Whoop app to access the in-depth insights into your sleep, training, and recovery. New with the Whoop 4.0, you can gain a picture of your overall health. An SPO2 sensor and skin temperature sensor measure your blood oxygen levels, skin temperature, and heart rate to see how you might be deviating from your baseline vitals because of stress or illness. 

You can customize the look of your Whoop 4.0 with a variety of band, hook, clasp, and fast link slider color and finishes. It’s comfortable to wear, and is designed so you never have to take it off. 

Whoop is unlike other fitness wearables in that you’ll pay a monthly membership fee—starting at $30 monthly for six months—and you’ll receive the band for free.


Tracker Features

Sleep with haptic feedback, Strain, Recovery, Health, behavioral journal, week and monthly performance assessments, menstrual cycle coaching

Plays Music


Display Screen Type


Compatible App



1 year replacement


.7 inches wide

Water Resistance Level

10 meters



Tap and Pay


Battery Life

4-5 days

GGR Community Reviews

Whoop 4.0

Tried it? Review this product

Leave a Reply

Your email address will not be published.

Use one of the allowed file type: jpg,png,gif. The max size allowed is : 5 MB.


      If you’re someone who takes their training seriously, the Whoop 4.0 could be an effective tool for you to use.