But if youd like more data, either is a good unit for the purpose.

I preferred Ouras day-to-day experience, but WHOOPs monthly analyses are a data nerds delight.

The WHOOPs pricing model makes me wonder: How long do youneedto track your recovery?

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Anyway, WHOOP has some cool features.

Its a lightweight rectangle with an elastic strap.

The strap is meant to be worn 24/7, and it has a clever way to charge.

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This way, you never have to take off the strap itself.

WHOOP sent me a spare one, which was handy to change into on those occasions.

(Spare bands, and spare charging batteries, both cost extra.)

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Using the app

WHOOPs app is straightforward in some places and arcane in others.

At first, I was always forgetting where I saw a certain number or feature.

The strain score is based on your heart rate throughout the day.

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Still, bigger numbers mean youve spent more time with your heart rate elevated.

Recovery is another single number, this time given as a percentage.

A string of reds, on the other hand, probably means something is wrong.

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As youre looking through the app, my best advice is to mess with everything you see.

One of the most fascinating features WHOOP offers is the sleep coach.

Thats not so special in itself; many apps do the same.

Whats different here is that you could choose whether you want to peak versus perform versus get by.

These reports tell you about your trends.

I chose several, including whether I had had alcohol and whether my stress was particularly high.

Its interesting to see the data right in front of me.

Now, these arecorrelations, distinct from causation.

So its important to be thoughtful about how you interpret your data.