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
GGR Score: 4.5
Product Highlights
Fitness tracker without display
Whoop app delivers data
Tracks blood oxygen, skin temperature, and heart rate
Whoop 4.0 Review (2026): The Best Fitness Tracker Out There?
Author: Anthony O'Reilly CPT, CNC
Our Whoop 4.0 review from a certified personal trainer will let you know if you fall into the category of people who would benefit from buying this fitness tracker. Read the full review.
Pros & Cons
Pros
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
Cons
Monthly membership fee required
No step counter
No watch face or display
Product Summary
If you’re someone who takes their training seriously, the Whoop 4.0 could be an effective tool for you to use.