MindBridge

Inspiration We thought of mental health due to the topic’s urgency and felt it was important to provide an accessible, judgment‑free space for anyone to start a conversation and feel heard.

What it does MindBridge is a cross-platform mobile app (iOS & Android) where users can:

• Chat 24/7 with an AI-powered “listening companion” trained to provide empathetic responses.

• Track mood over time using quick daily check-ins.

• Explore curated self-care exercises (breathing guides, journaling prompts, grounding techniques).

• Connect to emergency resources or local hotlines when deeper support is needed.

How we built it

• Frontend: React Native on Expo — npx expo start gets you running in seconds. We used React Navigation for smooth in-app flows and Recoil for lightweight state management of user sessions and mood logs.

• Deepseek API: We crafted custom prompt templates to ensure empathetic tone and mental-health safety filters.

• Backend: Node.js + Express with Firebase Auth for anonymous email/password login and Firestore for storing user profiles and mood-check history.

• Styling: Tailwind CSS for React Native (twrnc) to speed up layout and ensure a consistent, calming color palette across screens.

Challenges we ran into

• AI Safety: Tuning the prompts so the bot stays compassionate without giving harmful advice. We added a keyword-blocklist and fallback messages.

• Performance on Mobile: Expo’s JS bundle was growing too large. We optimized by lazy-loading non-critical components and pruning unused assets.

• UX for Sensitive Topics: Crafting onboarding flows that feel supportive rather than clinical required multiple design iterations and user testing.

Accomplishments that we’re proud of

• Built a fully functional MVP in 48 hours at DreamHacks.

• Implemented end-to-end encrypted chat logs, so users can feel secure sharing private thoughts.

• Integrated real-time sentiment analysis to adapt the bot’s tone dynamically.

• Received overwhelmingly positive feedback from our on-site demo testers—many said they’d actually use MindBridge daily.

What we learned

• The importance of rigorous prompt-engineering: small tweaks in system messages dramatically changed the bot’s empathy level.

• Designing for mental-health apps demands extra attention to accessibility (high contrast, large fonts) and careful wording.

• Rapid prototyping with Expo + React Native is a game-changer for hackathons—being able to preview changes instantly on our phones kept our momentum high.

What’s next for MindBridge

• Add voice input/output so users can speak naturally, reducing text fatigue.

• Implement peer-support circles where users can opt in to anonymous group chats moderated by AI.

• Expand our resource database with location-based professional services and crisis lines.

• Launch a closed beta to gather real-world usage data and iterate on conversation flows before a wider public release.

Built With

• deepseek
• expogo
• javascript
• react
• react-native
• visualstudiocode