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PERSONAL SAFETY AND EMERGENCY TECHNOLOGY
HushHalo
Protection that speaks when you cannot.
HushHalo enables people in dangerous situations to request help discreetly without visibly operating their phones.
TEAM
DeVDash
TEAM MEMBER
Kritirupa Hazarika
SCREEN OFF · SILENT
SILENT SOS
Location
SMS fallback
Encrypted
Concept visual · simulated
HushHalo
When Asking for Help Can Increase the Danger
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SOS apps assume you can unlock, open and tap—visibly.
TRADITIONAL EMERGENCY FLOW
Unlock phone
›
Open app
›
Tap visible SOS
›
Aggressor notices
Slow. Visible. Risky.
GAPS TODAY
32%
of women worldwide have experienced physical and/or sexual violence in their lifetime
Source: WHO, Violence against women prevalence estimates, 2023 (who.int)
WHO NEEDS SILENT HELP
Students travelling alone
Domestic-abuse victims
Elderly and disabled people
Field and night workers
HushHalo
A Silent Emergency Workflow
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HushHalo turns an ordinary phone or wearable into an invisible emergency lifeline.
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Secret trigger
›
2
Silent vibration confirm
›
3
5-second cancel window
›
4
Encrypted alert processing
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5
Internet or SMS fallback
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Contact acknowledges
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Location updates continue
SYSTEM ARCHITECTURE
Wearable
Gesture trigger · Planned
Phone app
Flutter / React Native · encrypted local storage
Secure backend
Firebase / Supabase · Firestore / PostgreSQL
Contact dashboard
Alerts · live map · timeline
Google Maps SDK
Location · route
Firebase Cloud Messaging
Real-time push
Android SMS / Twilio
Offline fallback
BUILT DURING BUILD
Alert flow: trigger, cancel window, SMS fallback, contact dashboard
PRE-EXISTING SERVICES
Google Maps, Firebase, SMS service, OS APIs, open-source libraries
PLANNED, NOT YET IMPLEMENTED
Wearable gestures, on-device voice detection, Bluetooth relay, AI risk detection, verified responders
HushHalo
From Hidden Trigger to Confirmed Help
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Trigger setup
Insert screenshot
1
Secret trigger performed
Working
›
Cancel countdown
Insert screenshot
2
Vibration and countdown start
Working
›
Alert sent
Insert screenshot
3
Time, location, battery, connectivity captured
Working
›
Contact dashboard
Insert screenshot
4
Contact opens alert and live map
Working
›
Emergency timeline
Insert screenshot
5
Contact acknowledges; coded vibration back
Simulated
MOCKED / SIMULATED
[ENTER simulated screens, sample locations, sample SMS output]
CURRENT LIMITATIONS
[ENTER limitations: background permissions, SMS cost, wearable availability, limited testing]
RESULTS
Functional prototype flow demonstrated
HushHalo
Designed for Situations Where Visibility Is Dangerous
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Hidden triggers
Less screen dependence
Decoy interface
Conceals the action
Vibration codes
Silent two-way reply
Store-and-forward
Survives network loss
Privacy zones
Auto data expiry
4 alert levels
Response fits the risk
FOUR ALERT LEVELS
Monitor Me
Call Me
Send Someone
Immediate Emergency
TRADITIONAL SOS APP
HUSHHALO
Visible interaction
Hidden activation
Internet-dependent
Internet + SMS fallback
One-way alert
Silent two-way response
Basic location
Privacy controls
Android-first: background services, button patterns, SMS and location access suit a prototype.
Challenge: false alarms. Fix: configurable trigger, vibration confirm, cancel window.
HushHalo
From Hackathon Prototype to a Real Safety Network
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Prototype
NOW
›
Campus Pilot
PLANNED
›
Wearable Integration
PLANNED
›
Verified Response Network
PLANNED
POTENTIAL USERS AND PARTNERS
Campuses and hostels
Night-shift employers
Elder-care and caregivers
NGOs and survivor support
Hospitals, transit, authorities
“HushHalo does not wait for users to visibly ask for help—it gives them a silent path to safety.”
Help us transform HushHalo from a working prototype into a trusted real-world safety system.
Thank You · Protection that speaks when you cannot.
HushHalo