Research shows AI detects stress 6.7 minutes before you feel it. Lucid runs that science on every call — 20+ vocal biomarkers, clinical-grade precision, processed entirely on your Mac.
No credit card required. 30-day free trial.
This isn't science fiction — it's neuroscience.
When you're stressed, anxious, or depressed, your autonomic nervous system alters how your vocal cords vibrate. Micro-changes in pitch, jitter, shimmer, and spectral energy — signals you can't control, can't fake, and can't suppress.
Researchers have known this for decades. What's new is a 244M-parameter model trained on 35,000 patients that can read these signals from 25 seconds of natural speech. In clinical studies, AI detected stress markers 6.7 minutes before athletes self-reported — with 84.7% accuracy.
Unmanaged stress doesn't just feel bad — population-level data shows anxiety and depression are associated with dying 7.9 years earlier. Voice biomarkers are involuntary neurological signals that bypass the cognitive filters causing people to minimize what they're experiencing. The signal is always there. In every conversation, every call, every meeting. Lucid monitors the biomarkers that predict these conditions before they become clinical.
Not a questionnaire. Not a journal entry. A single score derived from involuntary vocal biomarkers — updated every time you speak.
Updated with every conversation. No manual input required.
Six acoustic signals. Every voice session, decoded into biomarkers your doctor doesn't measure yet.
No waitlist. No insurance approval. No 9.8-year wait.
The same model validated on 14,898 patients. Running locally on your Mac's neural engine. No cloud. No intermediary.
During normal calls and conversations, Lucid passively extracts 20+ acoustic features and runs them through the clinical model in real time. No questionnaires. No self-reporting.
Within days, you'll have continuous data on stress, mood, depression risk, and anxiety signals — the kind of monitoring the current system only provides after you crash.
Function Health took a $10,000 lab panel and made it $1/day. Lucid takes the Athlete Monitoring System used by 80% of Premier League clubs and runs it on your Mac for $14.99/month. The research was funded. The model was validated. Apple Silicon made it runnable.
| Feature | Lucid | Mood Journals | Therapist |
|---|---|---|---|
| Passive — zero daily effort | ✓ | ✕ | ✕ |
| Objective biomarkers | ✓ | ✕ | ✕ |
| Clinically validated AI | ✓ | ✕ | ● |
| Continuous monitoring | ✓ | ✕ | ✕ |
| Correlates with wearables | ✓ | ✕ | ✕ |
| Raw data export & API | ✓ | ✕ | ✕ |
| 100% on-device / private | ✓ | ✕ | ✓ |
| Human clinical insight & empathy | ✕ | ✕ | ✓ |
| Under $15/month | ✓ | ✓ | ✕ |
| Detects what you can't self-report | ✓ | ✕ | ● |
Continuous emotional wellness monitoring at a fraction of the cost
No credit card required. Cancel anytime. Your data stays local, always.
Every claim on this page traces back to published, verifiable science.
The world's highest-performing organizations don't guess about mental state. They measure it.
Track player mood and mental readiness weekly as part of standard athlete monitoring systems.
Reduced injury rates by 22% after integrating mental readiness monitoring into their performance program.
Five-time NFL All-Pro DeAndre Hopkins and Olympic athlete Colleen Quigley back voice-based AI performance tracking through Sonde Health's advisory board.
The Premier League uses these insights to prevent injuries. DeAndre Hopkins uses them to stay in the NFL at 34. Lucid brings the same approach to your desk.
This is a desktop application, not a mobile application. We utilize advanced machine learning algorithms to provide you with the most accurate and comprehensive data about yourself possible — data your phone isn't capable of processing locally.
No. That's the point. When the system pays for your mental health care, the system sets the terms — what you're screened for, how often, what counts as "treatment." Lucid is $14.99/month. You pay for it, you own it, your data stays yours, and no one else decides what you do with it.
No. Lucid is a monitoring tool, not a treatment provider. Think of it like a continuous blood pressure monitor — it gives you data, not a diagnosis. It complements therapy by giving you objective data to share with your provider, or it serves as an early warning system for people who don't have access to regular care.
Many therapists find that clients who track their mental wellness between sessions bring richer, more objective data to their appointments. Lucid gives your clients continuous biomarker data that complements your clinical assessment — think of it as the mental health equivalent of a patient bringing their blood pressure readings to a checkup. It doesn't replace your expertise; it augments it with passive, objective data.
Two things: Apple Silicon made on-device inference practical (the M1+ Neural Engine runs the full 244M-parameter model locally), and the underlying model completed clinical validation — a 14,898-person double-blind study published in the Annals of Family Medicine. The combination means hospital-grade AI can now run on consumer hardware.
For context: the PHQ-9 (the standard depression screening used by nearly every doctor) has comparable sensitivity for a single administration. The difference is the PHQ-9 is given once a year and relies on self-report. Lucid monitors continuously and uses involuntary biomarkers. A 71.3% signal measured daily is far more actionable than a single annual questionnaire.
Lucid is a wellness tool, not a medical device. The underlying Kintsugi DAM is clinically validated and peer-reviewed, but Lucid provides voice biomarker data for personal wellness — similar to how Oura provides HRV data without being a medical device.
Track your mental wellness trends daily, identify triggers and patterns, share objective data with your therapist or doctor, catch downward trends before they become crises, correlate with sleep/exercise/habits, export for your own analysis.
No — and we'll be honest about that. Lucid provides objective monitoring data, not clinical treatment. But for the millions who can't access regular care, continuous monitoring is infinitely better than the current alternative: nothing. It can also help you know when to seek help.
Nowhere. Literally. The model runs 100% on your machine. Your voice is processed locally and never uploaded to any server. Only numerical biomarker scores are stored, on your machine. Lucid works with your internet disconnected — that's how you know.
You don't need a referral. You don't need insurance approval. You don't need to wait for the system to decide you're sick enough to deserve help.
The technology exists. It was never meant for you. Now it is.