Your physiology. Explained, not just scored.
Ozzie unifies training, wellness, blood, and behaviour data from Intervals.icu, Strava, and 20+ wearable platforms — then tells you why your recovery is 62, which habits actually move it (strain-controlled, with confidence intervals), and exactly what to experiment with next.
Free to start · No hardware lock-in · Connects Garmin, Oura, Wahoo, Polar, COROS, and more
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Sunday · sample data
Illustrative — not your account
Morning vitals
HRV
68 ms
+14% vs baseline
Resting HR
47 bpm
−2 vs avg
Sleep
7h 50m
above target
Body battery
82
recharged
Yesterday strain
14.2
of 21
Sleep score
84
of 100
Why 76?
Recovery attribution
Coach
“HRV is 14% above your 30-day baseline — your best reading this block. Load has been steady and sleep is on target. Good window for intensity today.”
Yesterday's journal
Live dashboard — recovery with attribution, strain (activities + steps), sleep stages, journal patterns, and AI insights in one view.
20+
Wearable platforms
0–21
Strain scale
13
Journal habits tracked
95%
Confidence intervals
What Ozzie actually does
Most fitness apps show you numbers. Ozzie shows you causes — with honest confidence levels, not fake precision.
Causal behaviour analysis
See how alcohol, supplements, sleep timing, and 13 other habits actually affect your recovery — strain-controlled so a hard training day doesn't masquerade as your magnesium working. 95% confidence intervals on every estimate.
Blood biomarker tracking
Upload lab results and track them over time against your personal optimal bands. Ozzie correlates supplement adherence with your lab results and forecasts likely drift based on your habits.
Score attribution
When your recovery is 62, Ozzie shows you exactly why — prior-day strain, sleep deficit, late meal, magnesium — each with an estimated points contribution based on your own data, not population averages.
Multi-source data hub
Connects Intervals.icu and Strava — covering Garmin, Wahoo, Polar, COROS, Oura, Zwift, Whoop, and 20+ other platforms. One view for HRV, strain, sleep, training load, and blood, whatever hardware you use.
AI coaching on real data
Daily insights and weekly digests written from your actual time series — not generic advice. The AI sees your load model, journal patterns, blood trends, and upcoming schedule.
Proactive smart alerts
HRV suppression streaks, sleep debt accumulation, confirmed high-confidence journal patterns, and flagged biomarkers — surfaced automatically so you don't have to hunt for them.
Depth where it counts
Built for athletes who want the truth about their physiology — not a clean number that hides the complexity.
| Capability | Typical app | Ozzie |
|---|---|---|
| Recovery score | Number shown | Score + full attribution breakdown |
| Habit tracking | Yes/no logging | Strain-controlled causal analysis + CI bars |
| Blood biomarkers | Not integrated | Labs + habit correlation + drift forecast |
| Interaction effects | Single-variable | Alcohol × stress, late meal × strain, etc. |
| Explainability | Black box | Every score shows its reason |
| Device lock-in | Often one ecosystem | Any device via Intervals.icu |
| AI coaching | Generic tips | Written from your actual time series |
Not locked to one wearable
Ozzie is built around open fitness infrastructure. You bring your data; Ozzie brings the analysis layer. No proprietary hardware required.
Intervals.icu
Primary hub — wellness, activities, planned workouts, HR zones
Strava
Ride & run detail, cycling power, GPS routes, activity history
Garmin Connect
HRV, sleep stages, body battery, stress, SpO₂ — direct integration
Withings
Body composition — weight, body fat, muscle mass over time
Oura, Polar, COROS, Wahoo, Zwift…
Via Intervals.icu — 20+ platforms covered automatically
Up and running in 3 steps
- 1Sign in with your email — no credit card required. Free trial gives you full access.
- 2Connect Intervals.icu with your API key. The first sync pulls months of wellness and activity history automatically.
- 3Open Intelligence once to build analytics. Then use Dashboard daily — and start journaling for behaviour insights that compound over weeks.
Built for the quantified athlete
If you've ever wondered whether that supplement is actually doing anything, why your HRV tanked mid-block, or what your blood results mean for training — Ozzie is the tool you've been looking for.
Serious endurance athletes
Cyclists, runners, and triathletes who want load management with actual intelligence behind the numbers.
Health-performance hybrids
Athletes who also track blood work, supplements, and longevity markers alongside their training.
Quantified-self enthusiasts
People frustrated by black-box recovery scores who want to see the data and the reasoning behind every number.
Simple, honest pricing
Start free. Upgrade when you're ready.
Free
£0
Dashboard + sync, always
- ✓ Recovery, strain & sleep scores
- ✓ Data sync
- ✓ Activity feed
Pro
£9.99
/mo
or £89.99/yr — save 25%
- ✓ Everything in Free
- ✓ AI Coach + weekly digest
- ✓ Intelligence analytics
- ✓ Full habit analysis + CI
- ✓ Blood biomarkers
- ✓ Score attribution
No credit card required
Ready to understand your physiology?
Free to start. Connect Intervals.icu and your first sync pulls months of history. No hardware lock-in — your data stays yours.