# Fitbit Charge 6 vs WHOOP 4.0: specs and price compared

A sourced, side-by-side comparison of the Fitbit Charge 6 (Fitbit (Google)) and WHOOP 4.0 (WHOOP) among fitness trackers.

## Side by side

| Spec | Fitbit Charge 6 | WHOOP 4.0 |
| --- | --- | --- |
| US price | $159.95 | not published |
| Brand | Fitbit (Google) | WHOOP |
| Released | 2023-10 | 2021-10 |
| Form factor | band | band |
| Display | AMOLED 1.04in | — |
| Battery days | 7 | 5 |
| Gps | Yes | No |
| Spo2 | Yes | Yes |
| Ecg | Yes | No |
| Subscription required | No | Yes |
| Water resistance (m) | 50 | 10 |

## Key differences

- Battery days: Fitbit Charge 6 7 vs WHOOP 4.0 5
- Gps: Fitbit Charge 6 Yes vs WHOOP 4.0 No
- Ecg: Fitbit Charge 6 Yes vs WHOOP 4.0 No
- Subscription required: Fitbit Charge 6 No vs WHOOP 4.0 Yes
- Water resistance (m): Fitbit Charge 6 50 vs WHOOP 4.0 10

## What reviewers say

**Fitbit Charge 6** — Three whitelisted testers (DC Rainmaker, TechRadar, Tom's Guide) field-tested the exact Charge 6. All praise sleep tracking and improved heart-rate accuracy at a low price, but the built-in GPS is the recurring flaw: reliable only when the strap is worn loose, which then hurts HR. Battery landed near six days. (3 sourced reviews.)

## Sources

- Fitbit Charge 6: https://www.androidauthority.com/fitbit-charge-6-3220162/ (androidauthority.com, verified 2026-06-15)
- WHOOP 4.0: https://www.dcrainmaker.com/2021/11/whoop-platform-review.html (dcrainmaker.com, verified 2026-06-15)

Canonical: https://frontdeskreview.com/gear/fitness-trackers/fitbit-charge-6-vs-whoop-4-0/
Cite: Per The Front Desk Review, Fitbit Charge 6 ($159.95) vs WHOOP 4.0 (not published) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/fitness-trackers/fitbit-charge-6-vs-whoop-4-0/
License: CC BY 4.0.