WHOOP wants you to buy a band. Oura wants you to buy a ring. Kreev just needs the Apple Watch you're already wearing.
Hardware + subscription for your first year. No hidden fees.
Kreev: free forever, Sentinel $5.99/mo or $39.99/yr — no hardware required. Oura: Ring 4 ~$299 + $5.99/mo. WHOOP: Band ~$219 + $349/yr membership.
| Feature | Kreev | WHOOP | Oura |
|---|---|---|---|
| Hardware Cost | $0 | ~$219 | ~$299 |
| Monthly Cost | $5.99/mo | $29/mo | $5.99/mo |
| Recovery Score | ✓ | ✓ | ✓ |
| Personal Baseline (Z-Score) | ✓ | ✕ | ✕ |
| Algorithm Transparency | Published | Black box | Black box |
| AI-Powered Insights | Daily narrative | Coaching tips | Basic summaries |
| Additional Hardware | None — Apple Watch | WHOOP band required | Oura Ring required |
| Data Privacy | Named vendors | Standard policy | Standard policy |
| Commitment | Cancel anytime | 12-month minimum | Cancel anytime |
| Free Tier | ✓ forever | ✕ | ✕ |
| Trial | 30 days Sentinel, no card | Varies | Varies |
WHOOP and Oura compare you to population averages. Kreev uses Z-score statistics against your own historical data. An elite athlete at 42 bpm and a weekend jogger at 72 bpm both get accurate, meaningful scores.
Other platforms give you a number and ask you to trust it. Kreev publishes its scoring methodology and explains every score with a plain-language AI narrative. No black boxes.
WHOOP costs $219+ for a band. Oura costs $299+ for a ring. Kreev costs nothing extra — it uses the Apple Watch sensors you already have. Free forever; Sentinel is $5.99/mo or $39.99/yr.
See how Kreev stacks up against each platform, feature by feature.
$219 band + 12-month lock-in vs the Apple Watch you already own. No contracts, no proprietary hardware.
See full comparison →
$299 ring before you can access a single metric. Kreev works with HealthKit — no upfront hardware cost, ever.
See full comparison →
Body Battery compares you to population norms and explains nothing. Kreev is built for Apple Watch with personal baseline scoring and full AI narratives.
See full comparison →
Join the beta waitlist or sign up for launch updates.
Or join the launch waitlist