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// Case studies · Health and wellness / mobile app

Personal Inteligente

AI-Powered Fitness Platform

Comprehensive fitness and wellness platform using artificial intelligence to create personalized workouts with nutritional tracking, progress analysis, and real-time coaching.

Client
Fitness startup
Period
2025
Stack
Node.jsReact NativeOpenAI GPT-4Firebase
Personal Inteligente: AI-Powered Fitness Platform

// The challenge

Personal trainers following students over WhatsApp and spreadsheets: workouts, diet and progress scattered, with no history and no scale.

// What we delivered

iOS, Android and web app with AI-generated workouts, nutrition tracking, progress metrics, real-time trainer-student chat and subscriptions via PIX and card through three payment gateways.

3
payment gateways (PIX and card) in a single flow
GPT-4
generates personalized workouts by goal
iOS + Android
from a single codebase

Description

Personal Inteligente is a comprehensive fitness and wellness platform that uses artificial intelligence to create personalized workouts, offering nutritional tracking, progress analysis, integrated community, and real-time coaching system. The platform leverages GPT-4 to generate custom training programs adapted to individual goals and performance.

Key Features

  • AI-Powered Workouts: Automatic generation of personalized workouts using OpenAI GPT-4, adapted to individual goals and fitness level.
  • Progress Tracking: Detailed metrics and dashboards showing performance evolution and achievement milestones.
  • Nutritional System: Personalized meal plans with macro tracking and dietary recommendations.
  • Integrated Community: Fitness social network with achievement sharing and motivation features.
  • Personal Trainer Chat: Real-time messaging system with trainers via WebSocket for instant communication.

Technologies Used

  • Backend: Node.js, Express, Firebase Realtime Database, Socket.io for WebSocket
  • Frontend: React 18, React Native for mobile, Material-UI, Context API
  • AI Integration: OpenAI GPT-4 for personalized workout generation and smart adjustments
  • Infrastructure: Railway deployment, Firebase Authentication, GitHub Actions CI/CD, Cloudflare
  • Payment Gateways: EFI Pay, Mercado Pago, Asaas with PIX instant payment support

System Highlights

  • Smart Adjustments: AI automatically adapts workouts based on user performance and feedback.
  • Multi-Provider Auth: Firebase Authentication supporting Google, Apple, and Email login methods.
  • Cross-Platform: React Native mobile app with consistent experience on iOS and Android.
  • Subscription Management: Flexible plans (monthly, quarterly, annual) with automatic renewal and access control.

Video demonstration

Screens

Main Dashboard
Main Dashboard
Metrics Dashboard
Metrics Dashboard
Workout System
Workout System
Progress Analysis
Progress Analysis
Fitness Community
Fitness Community
Nutritional Plan
Nutritional Plan
User Profile
User Profile
Personal Trainer Chat
Personal Trainer Chat
Notification Center
Notification Center

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