HRV biofeedback was linked with a large reduction in self-reported stress and anxiety.
Meta-analysis of 24 studies and 484 people. Compared with control conditions, Hedges' g = 0.83.
Goessl et al. 2017, Psychological Medicine

Breath, Body, Mind
RE bridges ancient wisdom with modern neuroscience. Using breath, rhythm, and sound to bring your nervous system back into balance, and help your body recover from exercise and stress.
A physiological tool designed to optimise your well-being using breathwork, mindfulness, and sound frequencies. Measure your nervous system's response objectively with just your smartphone camera or smartwatch.

When you slow your breath to a consistent pace, something unexpected happens: your heart, lungs, and nervous system fall into rhythm with each other.
Researchers call this Resonance Frequency, the sweet spot where your internal systems stop fighting and start cooperating.
The sweet spot where cardiovascular efficiency is maximised.
Stimulates the vagus nerve, promoting emotional regulation.
Extended exhales to engage the vagal brake for deep evening calm.
Equal four-phase pacing for sharp focus and calm under pressure.

Think of your heart as a drummer. While a perfectly steady beat might sound good, your body actually performs best when the timing between beats varies slightly. Heart Rate Variability (HRV) is the measure of this healthy irregularity. A high HRV means your nervous system is flexible. It can accelerate and brake on demand, rather than running flat-out all the time.
Slow, paced breathing with heart rate variability biofeedback has been studied for stress, anxiety, depression and PTSD. The results so far are encouraging, though most studies are small.
HRV biofeedback was linked with a large reduction in self-reported stress and anxiety.
Meta-analysis of 24 studies and 484 people. Compared with control conditions, Hedges' g = 0.83.
Goessl et al. 2017, Psychological MedicineSmall studies using different measures. Read each finding on its own, not as a comparison between them.
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Everything you need to know about the upcoming RE app experience.
We are preparing to move from Beta (testing) to a Public release through Apple App and Google Play stores late 2026.
Join our closed beta. Choose your platform below, enter your email, and we will send you the private install links. As a thank-you, you will receive free lifetime access to the app (limited to the first 34 testers).
Beta channel for Google Android users and Android-compatible smartwatches.
TestFlight beta channel for iPhones and Apple Watches.