Calmix listens to the bodyso the mind canrest.
Calmix is a wrist-worn wearable that quietly measures the autonomic fingerprints of stress and turns them into gentle, just-in-time interventions for people living with obsessive-compulsive disorder.
Calmix · principles
Three quiet promises
A device that fades into the day and shows up exactly when needed.
Continuous, not episodic
Mood diaries miss the spikes between sessions. Calmix watches the autonomic signal twenty-four hours a day.
Objective, not subjective
Heart, sweat, skin and breath form an honest fingerprint of stress that survives a bad night or a hard week.
Adaptive, not generic
Every wrist is its own baseline. Calmix calibrates to you, and re-learns whenever you tell it the score was wrong.
The closed loop
How a moment of stress becomes a breath
A six-stage closed loop between body, signal, model and intervention — running on the wrist, on the phone, and quietly in the background.
Sense
Five sensors capture PPG, EDA, skin temperature, motion and derived respiration on a synchronized clock.
Condition
High-pass and low-pass filters trim drift and high-frequency noise. The accelerometer flags motion artefacts.
Extract
HR, HRV (SDNN, RMSSD), tonic and phasic EDA, temperature trends and activity windows become features.
Score
A weighted linear-nonlinear hybrid model returns a calibrated 0–100 stress score in real time.
Recommend
Above thresholds, Calmix suggests a 4-7-8 breath, a grounding exercise or a planned ERP/CBT cue.
Learn
You confirm or correct the score. The controller updates model weights so tomorrow it understands you better.
Five biosignals
Five honest narrators
Each modality answers a different question. Together they describe one person.
Heart
Optical blood-volume pulse at 25–100 Hz. HR, HRV (SDNN, RMSSD) and derived respiration.
Sweat
Tonic SCL and phasic SCRs sampled at 4–32 Hz reveal sympathetic arousal seconds after a trigger.
Skin
Peripheral skin temperature at 1–4 Hz. A slow vasoconstriction signal that holds for minutes.
Breath
Respiration rate inferred from the PPG envelope — wearable, no chest strap, gentle on the body.
Motion
A 3-axis accelerometer that gates the other signals so a brisk walk never reads as a panic attack.
Why it matters
Why this matters
Around 2–3% of people live with OCD. Sessions are weekly; symptoms are hourly. Continuous, objective signal closes the gap.
of the global population lives with OCD
continuous autonomic monitoring
from detection to a gentle nudge
“Calmix doesn’t replace therapy. It listens between sessions, and quietly hands the right exercise at the right second.”
— Project vision
Curious how the hardware works?
Inside the wearable: the sensors, the power tree, the closed-loop controller.
