WHOOP 5 vs WHOOP 4: Wrist Fit, Bands and Upgrade Value

My verdict

I still wear WHOOP, but if I were buying today, I would not purchase it. My current recommendation is yellow: consider the tradeoffs. Longer battery life is useful; it does not make the upgrade an automatic win.

What my video actually shows

In my January 2026 video and transcript, I show WHOOP 5 on my wrist and explain why the word “smaller” does not capture how it wears. I explicitly say I do not have WHOOP 4 there for a side-by-side demonstration. This is a wearing-experience discussion, not a caliper test or a measured comparison of both devices.

My concern is the height off the wrist, not just the width. Length can matter more for someone with a small wrist. The video contains my criticism of the size claim; it does not establish exact dimensions, prove an engineering cause, or show that everybody will find the new shape less comfortable.

Bands and the cost of changing generations

My existing WHOOP 4 bands did not carry over to WHOOP 5. That accessory change is central to my objection. Before upgrading, check the exact band, garment and charging accessory you use, and price a complete replacement setup. Do not assume that an accessory fits just because both devices carry the WHOOP name.

For grappling, see my separate Garmin and WHOOP training comparison. That guide covers placement and training use rather than repeating the size argument.

Who should keep their existing setup?

If your WHOOP 4, accessories and charging routine still work, decide which concrete problem an upgrade would solve. If battery life interrupts your overnight data, that is a more useful reason to reconsider than a general “smaller” claim.

For current prices, alternatives and required membership costs, use the wearables comparison. My older video explains the hardware objection; the comparison reflects my current buying opinion.