SafeNotes

SafeNotes is a disguised crisis management and reporting app for domestic violence and abuse victims in Singapore. It begins as a fully functional notes app with utilities, and transforms into a powerful support tool, hidden behind a calculator and 4-digit PIN.

⭐ Key Features

Disguised Interface

• Rich text notes with formatting
• Built-in calculator with standard functionality
• Search tool to highlight text

Secure Unlock

• Enter a secret 4-digit PIN into the calculator and press = to reveal the real UI
• Optional biometric failsafe via long-press
• Triple tap anywhere in real UI to return to disguise

SOS Mode

• Pre-filled emergency SMS with optional location + media links
• Media is uploaded (via Supabase) and expires automatically in 24h
• Quick-send to a trusted contact
• Designed for silent crisis help

Info & Support

• Educational InfoHub
• AI-powered emotional support chatbot (Gemini Flash 2.0)
• Media Journal (photos, audio, video — locally stored)

Privacy-Centric Settings

• Toggle location, camera, mic, and gallery access
• Update emergency message/contact and PIN
• “Reset to onboarding” wipes all data (except chatbot limits)

⭐ Screenshots

Disguise Mode

Notes

Calculator

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Real Interface

Home	SOS	InfoHub
Chatbot	Journal	Settings

⭐ Tech Stack

• React Native (via Expo)
• Gemini Flash 2.0: AI-powered, template-prompted emotional support chatbot
• SecureStore: AES256-encrypted local storage (for PIN, settings, emergency data)
• AsyncStorage: Stores chatbot message history and journal media
• Supabase: Cloud storage for SOS media uploads and metadata with cron-based expiry
• Cloudflare Workers: Generates dynamic HTML pages to display up to 5 media items

⭐ Architecture

⭐ Limitations & Notes

• No user authentication (for safety & privacy)
• Media shared via dynamic links (no MMS support in Expo)
• SOS to police only to be used in life-threatening situations, with compulsory location-sharing

⭐ Team

This project was developed as part of CODE_EXP 2025 by a team of four:
Chua Chloe: Core app architecture, SOS system, media journal, and overall integration
Justin Goh: Onboarding flow and user preference handling
Chew Wei Jie: InfoHub content and screen development
Cheong Kang Jie: AI chatbot implementation using Gemini Flash 2.0