Atlas
Whoop vs Atlas
Both give you a number in the morning that tells you how hard to go. One asks you to buy a band, wear it, charge it on its own cycle and pay a membership to keep it alive. The other reads the watch you already wear.
The short answer
If an Apple Watch is already on your wrist overnight, the inputs a recovery score needs are being recorded now: heart rate variability, resting heart rate, respiratory rate, sleep stages. Atlas reads them and scores them. There is no second device to buy and no second thing to charge.
Whoop sells the strap and the membership together. The band collects around the clock and goes places a watch will not, which is a real advantage for some people. It is also a second purchase, a second charging habit and a payment that never stops. Check whoop.com for their current lineup and pricing, which they revise often.
Atlas starts free. If the free score answers your question, that is where it ends.
Side by side
This compares how the two are built rather than what they charge, because Whoop changes its pricing and lineup on its own schedule.
| Compare | Whoop | Atlas |
|---|---|---|
| Hardware | A band you buy, wear and charge on its own cycle | The Apple Watch already on your wrist. Nothing else to buy. |
| Subscription | A membership. The band does nothing without it. | Free tier with the readiness score. Paid plans start at $9.99 a month. |
| Coverage | Around the clock, including sports where a watch is impractical | Whatever your watch records. Dense overnight, thinner while it charges. |
| Recovery basis | Its own recovery figure | Your own 7 and 60 day baselines rather than a population scale |
| Training load | A single strain number | Fitness, fatigue and form as three signals, with acute to chronic workload ratio. Pro Athlete |
| Your data | Whoop servers | Atlas servers, encrypted in transit. Never sold, never shared. |
Deciding whether you need a strap at all is a different question from choosing between these two. That one is covered on Whoop vs Apple Watch, feature by feature.
What Atlas adds to the watch you own
Your baseline, not a population average
A 60-day trend for direction and a 7-day trend for acute fatigue. A generic 0 to 100 score tells you how you compare to strangers. This tells you how you compare to you.
Training balance that respects fatigue Pro Athlete
Fitness, fatigue and form tracked as three separate signals, so you can tell loading from overreaching before the next session instead of after it.
Autonomic Load Index
A daytime stress score built on your personal Smallest Worthwhile Change thresholds, watching your HRV, your heart rate and how fast you settle after a stressor.
Sleep that explains performance
Nightly stages, efficiency and accumulated sleep debt, placed next to the recovery score so last night and today sit on the same screen.
Common questions
Can I run Atlas while I still have a Whoop?
Nothing stops you. Atlas reads whatever lands in Apple Health, so how much of your strap data carries over depends on what that strap writes there. Atlas is built around the Apple Watch today, and direct support for Whoop, Oura Ring and Garmin is planned. Wearing both for a few weeks is a reasonable way to decide.
What happens to my Whoop history if I switch?
Atlas does not import an archive from another service. It builds your baselines from the Apple Health history your watch has already collected, so if you have been wearing the watch alongside the strap you start with real context. If you have not, expect a few weeks of nights before the trend carries weight.
Does Atlas need a subscription to be useful?
No. The free tier gives you a training readiness score, a daily stress score and 7 days of history, which covers the push-or-rest decision most days. Paid plans buy depth: longer history, the daily workout recommendation, sleep stage analysis and training load. This is the structural difference from a strap membership, where the hardware does nothing at all without the subscription.
I train in contact sports. Which one fits?
The strap. A rigid watch is not practical or not allowed in a lot of contact settings, and a band worn on the bicep or in apparel collects signal your watch will miss. No amount of software on our side changes that.
Try it on the watch you already own
Free to start, no card required. Wear your watch tonight and the score is waiting in the morning.
Download Atlas on the App StoreWritten by the team that makes Atlas. We have tried to be fair to Whoop, including where it wins.