FeverLog - Private Fever & Medication Tracker

A privacy-focused, offline-first Progressive Web App (PWA) to track fevers and medication schedules for your family. Built with React 18 and Vite.

🚀 Live Demo

https://jzfdav.github.io/fever-tracker/

🚀 Features

🔒 Privacy First

• 100% Local: All data is stored on your device using LocalStorage.
• No Signup: No accounts, no passwords, no cloud servers.
• Offline Ready: Works completely offline without internet.

📊 Smart Tracking

• Interactive Charts: Visualize temperature trends over the last 24 hours.
• Fever Insights: Automatically calculates max temperature, trends (rising/falling ↗/↘), and duration.
• Episodes: Automatically groups logs into "episodes" based on time gaps.

💊 Medication Safety

• Dose Tracking: Log exact medication names and dosages.
• Smart Reminders: Intelligent countdowns based on specific medication intervals (e.g., Ibuprofen 6h, Paracetamol 4h).
• Safety Warnings: Visual indicators preventing accidental early dosing.
• Browser Notifications: Get notified when it's safe to give the next dose.

👨‍👩‍👧‍👦 Multi-User

• Multiple Profiles: Track unlimited family members (e.g., BABY, Self, Spouse) separately.
• Customizable: Add custom names for each profile.

🛠️ Utilities

• Theme Toggle: Switch between Dark (default) and Light modes.
• Backup & Restore: Export your data to a JSON file for backup or transfer to another device.
• Doctor's Report: Generate and share a text summary of recent fever and medication history.
• PWA: Installable on iOS (Add to Home Screen) and Android with offline support.

📸 Screenshots

Dashboard	Timeline	Input Modal

Settings	Dark Mode	Light Mode

🛠️ Tech Stack

• Framework: React 18
• Build Tool: Vite
• Styling: CSS Variables (Dark/Light mode support)
• State Management: React Hooks + LocalStorage
• Testing: Vitest + React Testing Library (100% Critical Path Coverage)
• PWA: vite-plugin-pwa
• Deployment: GitHub Pages (Automated via GitHub Actions)

🏃‍♂️ Getting Started

Prerequisites

• Node.js 22+ (Recommended)

Installation

1. Clone the repository

   git clone https://github.com/jzfdav/fever-tracker.git
   cd fever-tracker

2. Install dependencies

   npm install

3. Start Development Server

   npm run dev

4. Run Tests

   npm run test

5. Build for Production

   npm run build

📱 Installation (PWA)

• iOS: Open in Safari -> Share -> "Add to Home Screen".
• Android: Open in Chrome -> Menu -> "Install App".

📄 License

GPL-3.0 License. This copyleft license ensures that this project and any modifications to it remain open source forever.