Transform your mental health
Our providers use HRV biofeedback paired with mindfulness building to empower you to self-regulate your emotions

Clinically proven results
We’re a drug-free solution to stress and worry backed by empirical research, as well as decades of evidence on heart rate variability biofeedback.

How the Lief program works
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Track with Lief
Lief is the most intelligent, clinically accurate HRV wearable, and the only one that can intervene in real time to help your body de-stress with personalized HRV biofeedback.
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Train with coaches
Your Lief coach will connect with you one-on-one to provide evidence-based strategies to reduce stress and improve your well-being. You can sign up for coaching directly in the Lief app.
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Transform how you feel
As you learn how to breathe your way to higher HRV, you'll feel better from the inside out, and experience the power of calming your mind on-demand.

About us
Meet our team of Stanford trained providers and HRV biofeedback certified health coaches who will empower you to feel better with a natural solution.
Testimonials from Lief users

Seva S.
Two main ways that Lief helped my anxiety and depression were the alerts that let me know I’m in the red when I didn’t need to be, and helping me understand what works for me. Initially after being diagnosed with anxiety, I went on YouTube and watched like 50 videos on different tools that could supposedly improve my mental health. What I was quickly realizing was that some strategies were working for me, and some weren’t. Sure, a strategy may work for 90% of people and they published 50 studies proving it, but does it work for me? That’s the key. This is where Lief was instrumental for me. The things that are going to lower your anxiety and work for your body and mind, it’s so individual, and that’s why the Lief is so powerful.

Nick T.
I love being able to see my body’s response immediately. If I’m reacting strongly to a situation, it’s amazing to be able to see how effective I can be at self-regulating with the help of my Lief. Since it’s real time, I can get that feedback immediately. I also like that since the Lief is pretty discrete, no one knows it’s happening if I’m doing a mini-Downtime practice in a meeting. I can try to adjust and change where my numbers are right then and there. In the last 2 months it’s made a huge difference. The approach of being more relaxed has made a huge difference. I understand what my body needs now.

Jennifer P.
I view the automatic Downtime as a voice for my body. It’s a voice for my nervous system to tell me to take a restorative moment for myself. Hand in hand with the Lief, I’ve been meditating every day for 20 min. It started after I joined the Lief program, so my Lief is encouraging me to do more to support my health. To me, mental health is training my mind so I don’t get lost in all the drama of my thoughts. So the fact that my Lief is reminding me to meditate throughout the day and helping me implement a meditation practice has been instrumental.

Sven H.
In the past, I’ve been so mired in my own stress that I don’t have the presence of mind to recognize that I’m stressed. Since the Lief device tracks my HRV continuously and provides real time feedback, I’m able to step out of my stress spiral. My Lief reminds me to take some deep breaths to help me re-center and distance myself from whatever challenging emotions I’m experiencing. The Lief device helps me train my nervous system to be more balanced.

Bob S.
I view HRV tracking and training like training wheels — ultimately, the goal is to perceive your inner state. Lief helps you get there. Use your HRV as a feedback mechanism, so you can get concrete numbers about your internal state and then change it. Continuous real-time HRV tracking is powerful; it helps you connect real world circumstances that cause your HRV to change. You start to make correlations around eating sugary foods, for example, or getting into an argument, etc.