Meal Sensor - AI Nutrition Tracker | Flutter + NestJS Full-Stack App

Meal Sensor - AI-Powered Nutrition Tracking App

A complete, production-ready nutrition tracking platform built with Flutter, NestJS, React, and Laravel Filament. It combines AI-powered menu scanning, dish photo analysis, an intelligent nutrition coach, and 37+ mobile features to deliver a powerful diet tracking experience.

🚀 Key Features

📷 AI Menu Scanning

• Scan any restaurant menu with your camera (OCR + GPT-4o Vision)

• Instant calorie, protein, carbs, and fat breakdown for every dish

• Dietary tags — Halal, Vegan, Keto, Gluten-Free, and more

• Confidence scores per estimation + scan history

🍽️ Dish Photo Analysis

• Photograph your plate — AI identifies dish and portion size

• Returns full calorie and macro breakdown instantly

• One-tap logging to daily food diary

🤖 AI Nutrition Coach

• Conversational AI that knows your goals, preferences, and eating history

• Ask anything — "Is this keto?", "What should I order?", "Am I hitting my protein?"

• Session-based chat with message history

• Usage-limited by subscription tier

📊 Core Nutrition Tracking

• Food logging — search database, scan barcodes, or create custom foods

• Daily dashboard — calories, macros, water, exercise at a glance

• Goal setting with auto-calculated BMI/BMR/TDEE recommendations

• Meal types — Breakfast, Lunch, Dinner, Snacks with per-meal breakdowns

🏋️ Health & Fitness Tracking

• Weight, body fat %, and muscle mass logging with trend graphs

• Water tracking with daily goals and weekly averages

• Exercise logging with calorie burn calculation

• Body measurements — chest, waist, hips, thighs, arms

• Progress photo gallery with date and weight stamps

• Sync with Apple Health and Google Fit

🗓️ AI Meal Planning

• Generate weekly meal plans based on calorie targets and cuisine choices

• Daily macro balance across all meals

• Auto-generate shopping lists from meal plans

• Swap meals with AI-suggested alternatives

🍴 Restaurant Discovery

• Nearby restaurant search with radius filter

• Full menu browsing with nutritional data

• Filter by cuisine type and dietary compatibility

• Order builder — pre-plan meals with real-time macro totals

⚡ Fasting Tracker

• Multiple protocols — 16:8, 20:4, OMAD, custom

• Live timer with elapsed/remaining time

• Fasting history, statistics, and consistency tracking

🌿 Clean Eating Score

• AI scores each food 1–100 based on quality, additives, sugar, sodium

• Suggests cleaner alternatives

• Daily clean eating score with streak tracking

🏆 Gamification & Achievements

• XP system — earn XP for logging food, water, and exercise

• 100 levels with 40+ achievement badges

• Daily & weekly challenges with XP rewards

• Global and friends leaderboards

👥 Social & Community

• Friends system — send/accept requests, view activity

• Community feed — share achievements, meals, and progress photos

• Compete in challenges with friends

• Recipe sharing across your network

⚙️ More Features

• Voice Food Entry — speak naturally, AI parses and logs instantly

• Analytics & Insights — daily, weekly, monthly trends with AI summaries

• 15+ Dietary Preferences — Halal, Vegan, Keto, Paleo, Gluten-Free, and more

• Allergen Alerts — automatic warnings with severity levels

• CSV/PDF Export — share reports with doctors or dietitians

• Multi-Language — English, Spanish, Arabic

• Push Notifications — meal, water, exercise reminders via FCM

• Admin Panel — Laravel + Filament for user, subscription, and feedback management

🛠️ Tech Stack

📱 Mobile App (Flutter)

• Flutter 3.x / Dart — iOS + Android, 37 feature modules

• State management: Riverpod · HTTP: Dio

• Auth: Google Sign-In, Apple Sign-In, JWT

• Payments: in_app_purchase (iOS & Android)

• Notifications: Firebase Cloud Messaging (FCM)

• AI: GPT-4o Vision, Google ML Kit OCR

⚙️ Backend (NestJS)

• NestJS 10 (TypeScript) — 40 modules, 100+ endpoints

• Database: PostgreSQL (18+ tables) · Cache: Redis

• AI: OpenAI GPT-4o (Vision + Text)

• Storage: Cloudflare R2 with CDN · Email: AWS SES

• Payments: Stripe + Apple IAP + Google Play Billing

• Swagger auto-generated API docs

🌐 Landing Page & Admin

• React 19 + Vite 6 + Tailwind CSS landing page

• Laravel 11 + Filament admin panel

• CI/CD: 4 GitHub Actions workflows

💳 Subscription Plans

• Free — 5 menu scans/month, basic tracking, limited AI

• Premium Monthly — $4.99/mo — Unlimited scans, full AI coach, all features

• Premium Yearly — $69.99/yr — Same as monthly, save 42%

• Lifetime — $109.99 — All premium features forever

• 7-day free trial on all premium plans

📦 What's Included

• 📱 Full Flutter source code — 37 feature modules (iOS + Android)

• ⚙️ NestJS backend API — 40 modules, 100+ endpoints, DB migrations

• 🌐 React 19 landing page with legal pages

• 🛠️ Laravel + Filament admin panel

• 🔄 4 GitHub Actions CI/CD workflows

• 📋 Environment config templates (.env.sample)

• 📖 Swagger API documentation (auto-generated)

• 🔄 Free lifetime updates + support

✅ Requirements

• Flutter 3.0+ / Dart 3.0+

• Android API 21+ · iOS 14+ / Xcode 14+

• Node.js 18+ · PostgreSQL 14+ · Redis 6+

• PHP 8.2+ (for admin panel) · OpenAI API key with GPT-4o access

🍽️ Scan Any Menu. Track Every Bite.  |  📊 40 modules · 100+ endpoints · 37 features  |  🌍 EN · ES · AR