01
Wrist Temp Delta
Detects body temperature deviation from your personal baseline. Flags potential illness, inflammation, or hormonal shifts before symptoms are obvious.
Apple Watch
Oura Ring
WHOOP 4.0
02
HRR Decline
Heart rate recovery trend analysis. Declining HRR over consecutive days signals accumulated fatigue, overtraining, or cardiovascular stress — weeks before performance drops.
Apple Watch
Oura HR
WHOOP HR
03
VO2 Max Trend
Tracks estimated aerobic capacity over time. Declining trend against stable training load suggests recovery deficit. Rising trend confirms adaptation. Garmin provides the most accurate VO2 estimate.
Apple Watch
Garmin
Oura
04
Lag Correlation Engine
Finds delayed relationships between inputs and outcomes. Your wine on Tuesday affecting your HRV on Thursday. Your protein deficit on Monday showing in your recovery on Wednesday. This is the pattern finder.
Voice Logs
HRV Data
Oura
WHOOP
05
Compound Deficit
Identifies simultaneous deficits across multiple domains — sleep debt + protein deficit + high training load — that compound into a risk greater than any single deficit alone.
Sleep
Nutrition Logs
Strain
06
Circadian Score
Measures alignment of your sleep timing, meal timing, training window, and light exposure with your individual chronotype. Misalignment is invisible on individual metrics but measurable here.
Sleep Timing
Meal Times
Weather / Sunrise
07
Cortisol Proxy
Estimates cortisol rhythm from HRV patterns, waking HR, sleep architecture, and logged stress. High cortisol proxy changes training, nutrition, and fasting recommendations.
HRV
Sleep Staging
Feel Score
08
Nutrition Recovery
Tracks post-workout and post-sleep nutritional replenishment. Identifies whether food logs support or undermine the recovery your biometrics are trying to achieve.
Nutrition Logs
Active Calories
Kilojoules
09
Sugar-Insulin Impact
Estimates insulin load from logged carbohydrate and sugar intake — then correlates against HRV, energy, and recovery quality to identify metabolic response patterns specific to your body.
Food Logs
HRV
Readiness
10
Alcohol Recovery
Quantifies the residual metabolic impact of logged alcohol across a 48-hour window. Maps exactly how last night's drinks show up in this morning's HRV, sleep efficiency, and recovery score.
Alcohol Logs
HRV
Body Temp
Recovery %
11
Training Recovery
Synthesizes training load, strain scores, sleep quality, nutrition availability, and HRV into a single training directive — how hard to go, what zone, and for how long. Works across all wearables.
Apple Watch
Oura
WHOOP Strain
Garmin Load