Calories& Protein Tracker

Introduction

The "Calories& Protein Tracker" project aims to develop a fully functional and scalable calorie tracking application tailored for Indian users. The application will feature a modern user interface, a subscription system, AI capabilities, payment gateway integration, an analytics dashboard, and optimized performance for both Android and iOS platforms.

System Overview

The Calories& Protein Tracker is designed to assist users in monitoring their daily calorie and protein intake. It will provide personalized insights and recommendations based on user data and preferences. The application will leverage AI to enhance user experience and offer predictive analytics. The system will include a subscription model to unlock premium features and integrate a secure payment gateway for transactions.

Functional Requirements

• As a User, I should be able to register and create a personal profile.
• As a User, I should be able to log daily food intake and track calories and protein.
• As a User, I should be able to view personalized insights and recommendations.
• As a User, I should be able to subscribe to premium features.
• As a User, I should be able to make payments through a secure payment gateway.
• As a User, I should be able to access an analytics dashboard to view my progress.
• As a User, I should be able to receive AI-generated suggestions for meal planning.
• As a User, I should be able to set dietary goals and track progress.
• As a User, I should be able to receive notifications and reminders for meal logging.
• As a User, I should be able to access the app on both Android and iOS devices.

User Personas

• Individual User: A person looking to monitor and improve their dietary habits by tracking calorie and protein intake.
• Premium Subscriber: A user who opts for additional features and insights through a subscription model.

Core User Flows

• User registers -> creates profile -> logs food intake -> views insights -> sets goals -> tracks progress
• User subscribes to premium -> accesses advanced features -> receives AI suggestions -> makes secure payments
• User accesses analytics dashboard -> reviews progress -> adjusts dietary goals

Visuals Colors and Theme

• primary: #1E90FF (Dodger Blue)
• primary_light: #63B8FF (Light Sky Blue)
• secondary: #FF6347 (Tomato)
• accent: #32CD32 (Lime Green)
• highlight: #FFD700 (Gold)
• bg: #F5F5F5 (White Smoke)
• surface: rgba(255, 255, 255, 0.9)
• text: #333333 (Dark Charcoal)
• text_muted: #777777 (Gray)
• border: rgba(200, 200, 200, 0.5)

Signature Design Concept

The homepage will feature an interactive "Nutritional Galaxy" where each star represents a different nutrient or dietary goal. Users can click on stars to explore detailed information, drag to rotate the galaxy, and hover to highlight connections between different nutrients. This concept will be brought to life using @react-three/fiber and @react-three/drei for 3D interactions, creating an engaging and educational experience.

Interaction Model & Motion Direction

The landing page will employ a "parallax" interaction model, providing a layered depth effect as users scroll through the content. Decorative elements will move at varying speeds to create a dynamic visual experience, while the main content remains in the natural flow. Internal pages will adopt a "static" model to ensure clarity and ease of use.

Non-Functional Requirements

• The application must support high concurrency and scalability.
• The system should ensure data privacy and secure transactions.
• The app must be optimized for performance on both Android and iOS platforms.
• The user interface should be intuitive and responsive.

Tech Stack

• Frontend: React Native for mobile app development
• Backend: Python with FastAPI
• Database: MySQL or MariaDB, using Alembic for migrations
• AI Models: GPT 5.4 for user-friendly responses
• AI Tools: Litellm for LLM Routing
• Local Orchestration: Docker, docker-compose
• Server-side Orchestration: Kubernetes

Assumptions and Constraints

• The application will primarily target Indian users, considering local dietary preferences.
• The subscription model will be the primary revenue stream.
• The app must comply with local data protection regulations.

Glossary

• AI: Artificial Intelligence
• UI: User Interface
• LLM: Large Language Model
• RDBMS: Relational Database Management System
• API: Application Programming Interface

This document outlines the comprehensive system requirements for the Calories& Protein Tracker project, ensuring alignment with user expectations and technical feasibility.