Platforms
IOS, ANDROID
Free Tier
No
Paid Price
$249 device + $19/month
Sensors
1 supported
The Verdict
A unique HRV biofeedback device designed for stress and anxiety management. The wearable patch provides real-time coaching through vibrations when your HRV drops, helping you develop parasympathetic regulation skills.
Features
- Real-time HRV biofeedback
- Wearable patch design
- Vibration coaching for stress
- Downregulation training
- Therapist dashboard integration
- ECG-quality measurement
Pros
- Active intervention, not just tracking
- ECG accuracy from chest placement
- Discreet under clothing
- Clinically validated for anxiety
Cons
- Expensive device plus subscription
- Requires consistent wear
- Adhesive patches needed
- Less athletic focus
How Lief Works
Lief is a small patch worn on the torso that measures HRV continuously using ECG-quality sensors. When stress is detected (HRV drops), it delivers gentle vibrations to guide your breathing back to a calmer state.
Clinical Applications
Lief is used by therapists and mental health professionals as part of anxiety treatment protocols. The therapist dashboard allows clinicians to track patient progress and HRV patterns between sessions.
Compatible Sensors
- Lief Device