For substance use treatment providers
Help patients interrupt craving
before it spirals.
In a Harvard-led randomized clinical trial, adults using Lief alongside treatment had 64% fewer alcohol and drug use days and were 5× less likely to use when craving peaked.
01 · Clinical evidence
JAMA Psychiatry (2025)
A Harvard-led phase 2 randomized clinical trial used Lief as an adjunct to treatment as usual in the first year of recovery.
Read the randomized clinical trial →More than passive monitoring
Craving predicted use, but far less with Lief.
Illustrative — the moment-level craving→use relationship reported in the trial.
less likely to use when craving was strongest.
adults with severe substance use disorder.
Craving decreased with Lief — while increasing in the control group.
Phase 2 trial compared patients with Lief as an adjunct to treatment as usual versus patients receiving treatment as usual. Results are not a guarantee of individual outcomes. Lief Recovery complements clinical treatment, not replaces it.
02 · The moment
What happens when a craving hits.
An ordinary moment.
Worn discreetly on the torso, Lief tracks HRV continuously — ECG-grade signal, no screen, no effort.
A trigger lands.
A street corner, a phone call, a Friday night. HRV drops — and Lief vibrates. A private cue no one else can see.
The breath takes over.
Vibration paces the inhale and exhale, automatically. Patients feel their physiology settle in real time — no app required.
An optional check-in.
Afterward, Lief’s recovery-focused AI can help name the craving and the trigger while it’s fresh — and plan the next healthy action.
The session starts from data.
The episode, the exercise, and the check-in reach your care team — the next conversation starts from what actually happened.
03 · How it works
One program. Eight weeks. Minimal workflow burden.
Lief handles device logistics; your team gets a structured intervention — not another stream of raw biometric data.
Opt-in enrollment
Your team invites appropriate patients — no new clinical burden.
What your team sees
Enrollment status across your program.
Activate
The patient receives a Lief at home, and completes guided onboarding in the app.
What your team sees
Wear time and first HRV baselines.
Practice
Brief haptic biofeedback and AI support between visits — hundreds of reps in daily life.
What your team sees
Engagement, craving, and use check-ins, flagged when patterns change.
Review
Training shifts toward unprompted self-regulation — a skill that outlasts the device.
What your team sees
An 8-week summary with clinical outcomes to inform step-down and aftercare.
Aftercare
Patients who want to keep practicing continue month to month — the same wearable, app, AI coach, and check-ins.
What your team sees
Continued visibility into engagement, craving, and use through step-down.
Return
Patient sends their wearable back to us in the included pre-paid envelope.
What your team sees
Zero shipping logistics or inventory management.
Dashboard data informs — it doesn't replace — clinical judgment.
04 · Pricing
An 8-week program, with optional monthly aftercare.
Pricing models
Per enrolled patient for the 8-week program, with aftercare billed monthly for patients who continue.
Volume, platform, integration, and outcomes-reporting options for enterprise deployments.
Included in the program and aftercare
Start with a focused, opt-in evaluation or deploy across an existing pathway — virtual care, IOP and outpatient, or residential transitions.
05 · In their words
Press & patients.
“Huge potential to help its users better understand the emotions they’re feeling, and their impact on health.”
Chrissy Farr · CNBC
Press“As a person who has been struggling with anxiety for much of my life, Lief is a refreshing approach. The vibrations conditioned me to be more aware of my breath.”
Lief patient
Patient“Teaches your body to calm itself down.”
Business Insider
Press“Having immediate feedback when my HRV dramatically changes as a result of stress is a huge insight.”
Lief patient
Patient“Getting to know your triggers can help you prepare for them. HRV is a real thing!”
Today Show
Press“This stress-reducing device may be the answer to daily anxiety.”
Mashable
Press“Helps you manage your body’s natural stress response.”
Bustle
Press06 · FAQ
Frequently asked questions.
Is Lief Recovery a replacement for substance use treatment?+
No. Lief Recovery is designed to complement treatment as usual by giving patients an HRV biofeedback skill and structured support between clinical encounters.
Who was studied in the randomized clinical trial?+
The analyzed sample included 115 treatment-seeking adults in the first year of an abstinence-based recovery attempt. Approximately 95% had severe substance use disorder. Participants continued their existing treatment while the intervention group also used Lief.
Does the clinic have to manage device returns?+
We include free shipping and return logistics.
Can we begin with a smaller evaluation?+
Yes. Lief supports focused, opt-in evaluations as well as larger annual deployments. We recommend agreeing in advance on enrollment, engagement, outcome measures, and the success criteria for expansion.
Is reimbursement required?+
No. Lief Recovery can be purchased on a flat per-patient fee or a shared-risk model, as part of an organization’s clinical, innovation, research, or value-based care strategy. Coverage and billing vary by organization and payer.
What happens after the 8-week program?+
Patients can continue with optional aftercare, billed monthly: the same wearable, app, AI coach, and check-ins, with continued care-team visibility. When a patient finishes, they return the device in the included pre-paid envelope.
BRING LIEF RECOVERY TO YOUR ORGANIZATION
A recovery skill for when the clinician isn't in the room.
Tell us about your population and care model — we'll help scope a focused evaluation or enterprise deployment.