Garmin's Body Battery is a useful starting point — but it compares you to norms, not your own baseline, and explains nothing. Kreev is built for Apple Watch users who want to go deeper.
Hardware + subscription, year one. No hidden fees.
Kreev: free to start, Sentinel $39.99/yr — uses your existing Apple Watch. Garmin: watch hardware $200–$800+; Garmin Connect free, Connect+ $9.99/mo.
| Feature | Kreev | Garmin |
|---|---|---|
| Hardware Cost | $0 (uses Apple Watch) | $200–$800+ (Garmin watch) |
| Monthly Cost | $5.99/mo | Free / $9.99/mo (Connect+) |
| Works with Apple Watch | ✓ Yes | ✕ Garmin only |
| Recovery Score | ✓ (0–100) | Body Battery (0–100) |
| Personal Baseline (Z-Score) | ✓ | ✕ Population norms |
| Algorithm Transparency | Published | Black box |
| Plain-Language Insights | Daily narrative, generated on-device | None |
| HRV Tracking | ✓ | ✓ |
| VO2 Max Tracking | ✓ | ✓ |
| Free Tier | Yes | Connect basic (limited) |
| Trial | 1-month Sentinel App Store trial | ✕ |
| Data Privacy | Kreev's watch app can't even read Apple Health — your iPhone computes your scores and sends only the finished numbers to your watch, over Apple's own encrypted connection | Standard policy |
Garmin's ecosystem is Garmin-only. If you wear an Apple Watch, you don't need to buy new hardware — Kreev is built specifically for HealthKit and delivers deeper recovery intelligence than Garmin's Body Battery.
Garmin's Body Battery is a useful aggregate metric, but it uses population benchmarks and doesn't explain itself. Kreev computes your score against your own Z-score baseline and generates a full narrative every morning, on your iPhone, explaining why.
Garmin does not publish how Body Battery is calculated. Kreev publishes its scoring methodology in full and explains every score in plain language. You always know what the number means and why it changed.
Sign up for launch updates — or read the beta recap.
Your name and email are stored by Brevo, our email provider, and used only for the messages you sign up for. Unsubscribe anytime. See our Privacy Policy.