Even keel
Silence as signal. The watch goes quiet so quiet means safe.
Most meltdowns are predictable two to four minutes before they erupt. Keel reads your child's nervous system in real time and helps them ride it out, gently, with you.
Seven days of silent observation. Keel learns your child's unique HRV patterns; morning, afternoon, school day, after-school. Not population averages. Theirs.
A continuous haptic wave on the wrist; soft, submerged, invisible to anyone nearby. It reflects their physiological state in real time. Softer means calmer. Stronger means something is building.
When the wave builds, breathing tools activate. The haptic rhythm guides the breath. The child follows the wrist. Their body follows their breath. The wave softens. They feel themselves arrive.
Six haptic states. No words required. Children learn them in days; parents read them at a glance.
Silence as signal. The watch goes quiet so quiet means safe.
A slow swell on the wrist. Eight-second loop. An invitation, not an alarm.
A continuous wave that intensifies with the score. Stays until the body settles.
Resonance-frequency cadence. The wrist breathes; the body follows. Eyes can stay closed.
A sunburst on the wrist when the body — not behavior — confirms the return. A small, real win.
When you breathe alongside your child, your wrist sends a soft pulse. Presence at any distance.
Keel runs continuously and quietly. No notifications until they matter. The same wave reads differently on each surface and none of them shout.
HRV within baseline. Heart rate steady. Nothing fires on the watch. Silence means safe, and the child learns that silence means something. Your phone shows one short paragraph and a trend line. Quiet awareness, by default.
Haptic: none · Arc: resting
HRV dropping, heart rate trending. A slow rolling wave begins on the wrist; gentle, calibrated to the child's breathing cadence. On your phone, a short script with three options. An invitation, not an alarm.
Haptic: slow wave · Arc: amber pulse
Significant deviation. The wave intensifies with the score; breathing tools surface. Your child sees weather and a sun, never a number, never a label. Their language: "big feelings." Stays open until their body, not a tap, confirms recovery.
Haptic: continuous wave · Arc: red · Parent notified
HRV drops before dysregulation peaks. Not after. The pre-escalation window is real, typically 2 to 4 minutes, and measurable from a wrist-worn sensor. Keel operates in that window.
Haptic-guided resonance frequency breathing outperforms visual-only guidance for HRV recovery. Children breathe at a different resonance frequency than adults. At 7 to 9 breaths per minute versus 5.5 to 6.5. Keel adjusts automatically by age.
Every child's recovery window is different. Keel learns it from their data, not population averages. After ten confirmed events, your child's personal recovery baseline is established. The system calibrates to them, not to the mean.
Minutes of pre-escalation biometric signal before behavioral expression
Passive calibration before any alerts fire. This is your child's baseline, not anyone else's
Alerts during calibration. Keel watches quietly before it speaks
Keel works between the sessions... in classrooms, at dinner tables, on the way to school. Priced accordingly.
Monthly
Billed monthly. Cancel anytime.
Full access to all features. No long-term commitment.
Annual
That's $12.42/month — save 38%.
Everything in monthly, at the price of families who commit to the long game.
Free trial
No card needed. Full access.
Every plan starts here. See a full calibration cycle and your first real event before you decide.
Apple Watch Series 4 or later required · iOS 16+ · Keel does not replace professional medical advice, therapy, or clinical care.
Keel is in development. We're onboarding a few families at a time. Join the list and we'll hold your spot in the next wave.
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