The RE App: Three Signals, One Clear Read on Your Nervous System
Built from first principles as a bio-regulatory instrument: no notifications, no gamified streaks, and zero cloud lock-in. Every breathing session measures your heart before and after, giving you immediate, objective feedback.
Informational and self-regulation purposes only. Not a medical device.
At a Glance
- 01Every breathing session measures your heart before and after, so you can see your body settle, not just hope it did.
- 02Recovery is your instant read. Coherence rises live as you breathe. Balance is the long-term trend.
- 03Balance builds from a smartwatch automatically, or from a 14-day habit of quick camera scans.
- 04Every number is compared only to your own history. Never to a friend's, and never to a fixed chart.
Three numbers, three different questions. Recovery asks how charged you are right now. Coherence asks how in-sync your breath and heart are this minute. Balance asks how your baseline is trending over weeks.
Here is what each one means, in plain language, and how RE builds them from your data.
What your body is telling you
Recovery
RMSSD · beat-to-beat HRVHow charged your batteries are, right now.
Recovery reads your vagus nerve, the body's brake pedal and its rest-and-digest system. A higher number means your nervous system can down-shift quickly, so you bounce back faster from a hard workout, a bad night, or a stressful day. It is the single reading you get the instant a scan finishes.
Coherence
breath–heart synchrony · 0.1 HzHow in-sync your breath and heartbeat are.
When you breathe slowly and smoothly, your heart rate rises and falls in a wave that locks onto your breath. That synchrony is coherence, the physiological signature of calm, focused attention. It is the one metric you actively grow during a session: as you settle into the rhythm, watch it climb.
Balance
7-day rolling HRV vs. your 60-day baselineYour body's baseline, trending up or down.
A single day of HRV is noisy, because sleep, coffee, and stress all nudge it. Balance cuts through that by smoothing a full week of your resting readings and comparing it to your own two-month baseline. That is how you catch a real shift, whether it is building fitness or piling up stress, days before you would feel it.
Two ways in: watch, or camera
Balance runs on your resting heart-rate variability. RE can get that from a smartwatch automatically, or straight from your phone's camera, with no wearable required.
You have a smartwatch
- Connect once in Personal → Health Integrations and allow heart-rate access.
- RE reads up to 90 days of the resting HRV your watch has already recorded.
- It keeps up automatically as you wear your watch, with no scanning needed.
You use the camera
- Take a quick camera scan, fingertip on the lens, before a session or on its own.
- Each day you scan adds one day to your baseline (extra scans in a day still count as one).
- Full Balance unlocks once you've logged 14 days of readings.
Why post-session scans don't count toward Balance: a breathing session deliberately lifts your HRV, so a scan taken right after would flatter your baseline. To stay honest, Balance uses only your resting readings, taken before sessions or on their own.
While it gathers data, Balance shows "Building, day X of 14." The trend chart in your history starts drawing a line at 3 days, and your personal range band appears once the full baseline is set.
Three things worth remembering
Balance is yours alone
It's measured against your own history, so your number means nothing next to a friend's. Compare it only to your past self.
"7-day" is the smoothing
Each point on the line averages a week, but the chart itself spans 30 or 90 days, because a trend only means something across weeks.
A wellness tool, not a doctor
RE is for relaxation and coherence training. These readings are insights into how you feel, not a medical diagnosis.
How to Breathe with RE: Guide & Practice Video
Starting a new breathing practice should feel welcoming and effortless. Rather than forcing you to watch a shape on a screen, the RE app uses subtle audio pitch cues—rising high tone for inhale, falling low tone for exhale—so your eyes stay closed and your mind rests.
A Comfortable Position
Settle into a comfortable seated or lying position. You do not need to force a cross-legged posture or keep a rigid spine. Let your shoulders drop, unclamp your jaw, and let your body settle.
Helpful Hint: If sitting up makes your lower back tense, lie flat on your back with a pillow under your knees. Physical ease allows your nervous system to downregulate without postural strain.
Your Breath with the Sound
Inhale through your nose as the audio soundscape expands with a rising high tone. Exhale gently through your nose as the sound contracts back into a low tone.
Interesting Fact: Breathing through your nose releases nitric oxide into your airways. This compound opens pulmonary blood vessels and improves oxygen transport across your lungs.
Continuous, Wave-Like Breath
Let your breath flow continuously like a rolling wave. Do not hold or pause at the top of the inhale or at the bottom of the exhale. Turn smoothly at each pivot point.
Helpful Hint: Avoiding pauses keeps your heart rate variability moving in a smooth sinusoidal wave. Pauses create abrupt pressure spikes that disrupt smooth baroreflex pacing.
Gentle Attention and Return
When your mind inevitably wanders to daily tasks or thoughts, simply notice it without judgement. Gently return your attention to the feel of your breath and the rising and falling tone.
Interesting Fact: Wandering thoughts are not a failure of practice. Every time you notice a thought and redirect attention, your brain strengthens neural pathways for self-regulation.
Watch the Guided Practice Video
Experience how the rising high tone and falling low tone pair with smooth wave breathing in this short demonstration video.
Fascinating Facts & Practical Tips
Audio Pitch vs. Screens
Auditory pacing allows your eyes to stay closed, preventing visual fatigue and lowering cognitive strain.
The 5.5-Second Standard
Breathing near 5.5s aligns your respiration with your baroreflex rhythm (0.1 Hz) for peak HRV coherence.
Start Small & Be Consistent
Even 3 to 5 minutes daily shifts your autonomic nervous system from sympathetic stress into vagal recovery.
Find your Flow?
Test the pre-release app
Join our closed alpha. 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).
Android & Smartwatches
Alpha channel for Google Android users and Android-compatible smartwatches.
iPhone & Apple Watch
TestFlight alpha channel for iPhones and Apple Watches.
Progressive Web App (PWA)
Please note: The PWA version runs directly in your browser. It does not have all the advanced features of the native apps (such as standalone smartwatch haptic guidance or background biometrics).
Open Web App (PWA)