Overview
OnZai is a non‑contact safety and life‑monitoring app for people who live alone or are at higher health risk. It observes everyday signs of activity and rest, detects possible emergencies, and can automatically alert trusted contacts. It is not a medical diagnostic tool.
Core Functions
1. Multi‑Signal Monitoring
Movement and activity: Tracks body movement and walking activity to understand whether the user is active or unusually still.
Sound patterns: Listens for breathing‑like sounds, abnormal sounds (such as calls for help or impact noises), and prolonged silence.
Daily behavior signals: Considers device usage and step patterns as “proof of life” over time.
2. Intelligent Risk Assessment
Risk scoring: Combines multiple signals into a single risk score and classifies it into four levels: Low, Medium, High, and Critical.
Continuous evaluation: Looks for sustained abnormal patterns rather than one‑off events, reducing random false alarms.
“Hard evidence” priority: Gives greater weight to strong indicators of normal activity (for example, recent steps or device interaction).
3. Alert and Emergency Workflow
Graded alerts: For higher risk levels, OnZai can use vibration, sound, and on‑screen warnings to get the user’s attention.
Countdown before escalation: When risk is High or Critical, the app can start a countdown, giving the user time to cancel if they are safe.
Emergency contact actions: If the user does not respond, OnZai can automatically:
Call the primary emergency contact, and/or
Send an SMS with key information so someone can check in.
4. Network Contact Support
Trusted network: Users can add trusted people as “network contacts”.
Shared alerts: When a serious alert is triggered, these contacts can receive notifications and see that someone in their network may need help.
Status awareness: The app can show whether network contacts are recently online, helping families coordinate care.
5. Privacy and Data Handling
Local processing first: Sensor signals (movement, sound patterns, etc.) are analyzed on the device; raw data is not routinely sent to the server.
Minimal server data: The service mainly stores identifiers (such as user and device IDs), contact relationships, and alert records needed for delivering notifications.
User control: Users can stop monitoring at any time and manage contacts and notification settings from within the app.
No medical diagnosis: Results are summaries of risk based on behavior and sensor patterns, not medical measurements such as exact heart rate or clinical diagnoses.
Typical Use Cases
Elderly living alone: Family members get notified if the person appears inactive or unresponsive for an unusual period.
People with higher health risk: Provides a safety net between regular check‑ins or doctor visits.
Night‑time safety: Monitors for long periods of stillness or abnormal silence during expected sleep times.
Remote family monitoring: Children or caregivers can be part of a trusted network that receives alerts when needed.
Key Disclaimers
OnZai cannot confirm life, death, or medical conditions.
It is a risk warning and safety support tool, intended to trigger human follow‑up, not to replace professional care.
Alerts may occasionally be wrong in both directions (false alarms or missed events), so it should be used as an extra safety layer, not a single source of truth.

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Additional Information