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Companion App
App — Vitals & stress tiers
Apple Watch HR/HRV become a bounded, personalized stress score.
An Apple Watch streams heart rate and heart-rate variability into the app over a platform channel. The vitals engine compares them against a personal baseline to compute a single bounded stress score.
Four emotional-state tiers
- Calm — stress below 0.35.
- Elevated — 0.35 to 0.60.
- Stressed — 0.60 to 0.80.
- Crisis — 0.80 and above.
The companion adapts to the active tier: gentle and conversational when calm, more protective as stress rises. Stress computation lives in one place only, so the UI and the AI always agree on the user's state.
Safety tools such as SOS are gated to the stressed and crisis tiers, with an independent text-based crisis detector as a second trigger.
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