Features

Everything Cortisol+ does

Real-time cortisol estimation, sleep-cortisol correlation, and guided breathwork — all powered by your existing Apple Watch.

Real-time

HRV-based cortisol score

Continuous estimation from heart rate variability — the gold standard wearable biomarker for autonomic stress. Personalized to your baseline.

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Overnight

Sleep × cortisol

See how every night of sleep drives next-morning cortisol. REM, deep, and core sleep stage analysis correlated with your HRV-derived cortisol pattern.

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Intervene

Zen mode & breathwork

Guided breathing protocols — box, 4-7-8, physiological sigh, resonance — with Apple Watch HRV measurement of the cortisol-lowering effect after every session.

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