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The Whoop 4.0 fitness tracker measures SpO2, pulse and more as a bracelet or in special clothing

You can hide Whoop's latest fitness tracker in clothing. (Image source: Whoop)
You can hide Whoop's latest fitness tracker in clothing. (Image source: Whoop)
Whoop has revised its in-house fitness tracker, making it 33% thinner while adding several features. The bracelet will be optional in the future too thanks to Whoop Body, a clothing range with an integrated holder for the fitness tracker. Whoop remains a subscription-only service.

Whoop has announced version 4.0 of its eponymous fitness tracker. Like before, the Whoop 4.0 can collect heart rate, blood oxygen, skin temperature, and other vital signs. Supposedly, the new model contains more LEDs, five to be precise, allowing it to track heart rates more accurately.

Whoop 4.0 also offers sleep tracking and can tell people how much sleep they need. Similarly, an integrated stress coach should help you coordinate rest phases and training sessions, should you need help with that. The Whoop 4.0 retains its predecessor's excellent battery life, at up to five days, and its novel charging method. In short, the Whoop 4.0 can recharge via a waterproof battery that you attached while wearing the fitness tracker.

Additionally, the Whoop 4.0 can be worn without a bracelet, unlike its predecessors. Whoop has achieved this by developing Whoop Body, sportswear that allows you to holster the fitness tracker on your body. Whoop plans to offer leggings, sports bras, t-shirts, shorts and underwear under its Whoop Body brand. The company notes that the Whoop 4.0 requires skin contact to work, so it cannot be attached to outer clothes, such as a jacket or a hoodie.

Whoop does not sell its fitness tracker directly. Instead, you can only acquire it via a subscription service that Whoop sets at 6, 12 or 18-months. Currently, Whoop has priced these tiers at US$30, US$24 and US$18, respectively. Existing Whoop subscribers with at least 6 months' membership can request a Whoop Strap 4.0 for free. The Whoop 4.0 will begin shipping on September 27 in multiple markets.

(Image source: Whoop)

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> Notebook / Laptop Reviews and News > News > News Archive > Newsarchive 2021 09 > The Whoop 4.0 fitness tracker measures SpO2, pulse and more as a bracelet or in special clothing
Alex Alderson, 2021-09-10 (Update: 2021-09-10)