prebeat
Performance Physiology

Ready in 120 seconds.

Measure your physiological state with AirPods before any high-stakes conversation. Get a real-time readiness score and a guided reset if you need one.

Performance is physiological before it is cognitive. prebeat measures, regulates, and confirms your state — so you walk in ready, not hopeful.
AirPods Pro 2  ·  iPhone  ·  iOS 18+
9:41···
41
Over-Activated
94
HR BPM
22
HRV ms
Start Breathing Protocol
9:42···
Exhale
Slowly...
Cycle 3 / 5
82
HR BPM
-12
36
HRV ms
+14
64
Improving
9:43···
87
Ready
41
Before
87
After
+46 points in 120s
You're Ready
9:41···
0
Ready
68
HR BPM
52
HRV ms
Team Standup
In 8 minutes
You're Ready
9:41●●●
87
Ready
9:41●●●
...
Scanning
Built For These Moments [PB.01]

Before the
moments that matter.

Investor Pitches
Walk in composed. Your conviction matters more than your deck.
Sales Calls
Clients read your energy before your words. Set the right signal.
Job Interviews
Your best answers come when your nervous system isn't hijacking your thinking.
Keynotes
Stage presence starts backstage. Regulate before you walk out.
Difficult Conversations
Manage yourself first. Then manage the room.
Board Meetings
High stakes, no margin for error. Know your state before you enter.
How It Works [PB.02]

Scan. Regulate. Verify.

Put in your AirPods. Open prebeat. Get a readiness signal in 120 seconds. That's it.
01
Scan
AirPods Pro 2 detect your heart rate and heart rate variability via optical sensors. prebeat reads the signal and assesses your current physiological state.
15 seconds
02
Regulate
If your score is below threshold, prebeat selects a breathing protocol matched to your state. Visual and haptic guidance keep you on cadence. No guessing.
60 — 90 seconds
03
Verify
A second scan confirms the shift. You see the before-and-after score, actual heart rate change, and a clear ready / not-ready signal. Evidence, not vibes.
15 seconds
9:41●●●
...
Scanning
94
HR BPM
22
HRV ms
Analyzing...
15 sec scan
9:42●●●
64
Regulating
Exhale slowly...
82
HR BPM
36
HRV ms
60–90 sec regulate
9:43●●●
87
Ready
72
HR BPM
48
HRV ms
You're Ready
15 sec verify
What You See [PB.03]

Three screens. 120 seconds.

01 — Scan
Detecting state via AirPods
9:41●●●
...
Scanning
94
HR BPM
22
HRV ms
Board Review
In 14 minutes
Analyzing...
02 — Regulate
Guided breathing protocol
9:42●●●
64
Regulating
Exhale slowly...
82
HR BPM
36
HRV ms
Physiological Sigh
Cycle 3 of 5
Breathe with Guide
03 — Verify
Readiness confirmed
9:43●●●
87
Ready
72
HR BPM
48
HRV ms
64 → 87 (+23)
After physiological sigh
Ready for Board Review
How the readiness score works
Input 01
Heart Rate
AirPods PPG sensor reads pulse rate in real time. Compared against your personal baseline established over 3–5 sessions.
Weight: 35%
Input 02
HRV (RMSSD)
Beat-to-beat variability derived from inter-beat intervals. Higher HRV = more parasympathetic capacity = better regulation.
Weight: 40%
Input 03
Coherence Ratio
Frequency-domain analysis of HRV signal. Measures how organized the autonomic rhythm is — a proxy for self-regulation capacity.
Weight: 25%
Output
Readiness 0–100
Composite score. Above 70 = ready. 50–70 = moderate, regulation optional. Below 50 = elevated state, protocol recommended.
Personalized threshold
0
Readiness Score
0 bpm
Resting Heart Rate
0 ms
HRV After Protocol
0s
Total Time
Why This Is Different [PB.04]

Not meditation.

Most tools help you relax in general. prebeat prepares you for a specific moment, with measurement before and after.
Meditation Apps Smartwatch Alerts Breathing Timers prebeat
Measures your state No Passive only No Active scan on demand
Selects protocol for you No — you choose No No — generic timer Matched to current state
Confirms the shift No verification No verification No verification Before / after score
Time to use 10 — 20 min N/A 4 — 5 min 120 seconds
Tied to your schedule No After the fact No Calendar-aware triggers
Evidence-based output Subjective Limited data None Score, HR, HRV, shift
Measures your state
Meditation Apps No
Smartwatch Alerts Passive only
Breathing Timers No
prebeat Active scan on demand
Selects protocol for you
Meditation Apps No — you choose
Smartwatch Alerts No
Breathing Timers No — generic timer
prebeat Matched to current state
Confirms the shift
Meditation Apps No verification
Smartwatch Alerts No verification
Breathing Timers No verification
prebeat Before / after score
Time to use
Meditation Apps 10 — 20 min
Breathing Timers 4 — 5 min
prebeat 120 seconds
Tied to your schedule
Meditation Apps No
Smartwatch Alerts After the fact
prebeat Calendar-aware triggers
Evidence-based output
Meditation Apps Subjective
Smartwatch Alerts Limited data
prebeat Score, HR, HRV, shift
The Science [PB.05]

How we measure.

Real-Time PPG Signal
72
Beats / Min
How prebeat Reads You
AirPods Pro use photoplethysmography (PPG) — infrared light that reads blood flow inside the ear canal. prebeat captures this signal, extracts heart rate, inter-beat intervals, and HRV in real time, then maps them to a readiness score. The ear canal offers a cleaner signal than the wrist — and you already wear AirPods to meetings.
What prebeat Measures
Three metrics compose your readiness score. Heart rate (35%) flags acute elevation. HRV RMSSD (40%) reveals autonomic flexibility — your capacity to self-regulate under pressure. Coherence ratio (25%) measures how organized your nervous system rhythm is. prebeat weighs these inputs and returns a score from 0 to 100.
How prebeat Responds
If your score is below threshold, prebeat selects a breathing protocol matched to your state — not a generic timer. Physiological sigh for acute stress (Stanford, 2023). Resonance breathing at 6 BPM for moderate elevation (223-study meta-analysis). After the protocol, prebeat re-scans to verify the shift happened.
Why Trust This
3
Peer-Reviewed Protocols
Every breathing intervention is drawn from published clinical trials — not wellness blogs
40ms
Sensor Precision
AirPods Pro PPG sampling rate enables clinical-grade inter-beat interval detection
120s
Scan-to-Ready Cycle
Full loop from measurement through regulation to verified readiness confirmation
Before & After Proof
Every session generates a measurable before/after delta — not a subjective feeling
Stanford Medicine, 2023
Cyclic sighing reduces stress more effectively than mindfulness meditation (Huberman et al.)
Frontiers in Physiology, 2022
Meta-analysis: slow-paced breathing at 6 BPM increases HRV across 223 studies
IEEE Sensors Journal, 2021
In-ear PPG achieves comparable accuracy to wrist-worn clinical devices for stationary HR/HRV
Questions [PB.06]

Straight answers.

Which AirPods models work?

AirPods Pro 2 (USB-C) and AirPods Pro 3 — any model with the optical heart rate sensor. The original AirPods Pro (Lightning) and standard AirPods do not have the required sensor. You need iOS 18 or later for the health data APIs.

Is this iPhone only?

Yes. prebeat requires iPhone (iOS 18+) and AirPods Pro with heart rate sensing. The heart rate data is provided through Apple HealthKit, which is iOS-exclusive. Apple Watch support is planned for a future update.

How accurate is the measurement?

AirPods Pro use photoplethysmography (PPG) — the same optical principle as medical pulse oximeters. Heart rate accuracy is comparable to wrist-worn devices in stationary use. For best results, ensure a proper ear tip fit and stay relatively still during the 15-second scan. prebeat will tell you if signal quality is too low for a reliable reading.

Is this a medical device?

No. prebeat is a wellness and performance tool, not a medical device. It is not intended to diagnose, treat, or prevent any medical condition. The readiness score is a performance indicator, not a clinical measurement. If you have a heart condition, consult your physician first.

How is the readiness score calculated?

The readiness score (0-100) is a composite of heart rate relative to your personal baseline, current HRV, and cardiac coherence ratio. It calibrates to your individual physiology over 3-5 uses. Above 70 means your autonomic state supports clear thinking and presence. Below 50 suggests regulation before an important interaction.

Where is my data stored?

All physiological data stays on your device. Heart rate, HRV, and readiness scores are stored locally and never uploaded to our servers. Your calendar data is read locally to trigger pre-meeting scans — it is not transmitted. We do not sell or share your data.

What if I'm walking or moving?

Motion introduces noise into the optical signal. For the most reliable reading, be seated or standing still. If the signal quality is too low, prebeat will let you know and ask you to pause for 15 seconds. Walking slowly is usually fine; running is not.

Why not just use a breathing app for free?

Generic breathing apps give you a timer but no measurement. They don't know if you need calming or if you're already fine. They don't confirm whether the exercise actually worked. prebeat measures first, selects the right protocol for your state, and verifies the result. The difference is closed-loop feedback versus open-loop guessing.

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