Handy Meld - AI-Powered Home Improvement & DIY App

Handy Meld - AI-Powered Home Improvement & DIY App

A complete, production-ready home improvement platform built with Flutter, NestJS, and React. It combines AI-powered project guidance, 54 smart calculators, gamification, and subscription monetization to deliver a powerful DIY experience.

🚀 Key Features

🧮 54 Smart Calculators

• Painting — Wall, Trim, Deck Stain, Fence

• Flooring — Tile, Hardwood, Carpet, Laminate, Underlayment

• Roofing — Shingles, Pitch, Load Calculator

• Electrical — Wire Gauge, Circuit Breaker, Generator, Solar Panel

• Plumbing — Pipe Sizing, Water Heater, Drain Slope

• HVAC — BTU, Duct Sizing, AC Unit, Filter Reminder, Cost Estimator

• Building — Deck, Patio, Concrete, Drywall, Insulation, Lumber, Brick

• Garden — Plant Watering, Seed Calendar, Lawn Care, Compost, Greenhouse & more

• Pool & Spa — Pool Volume, Chemicals, Hot Tub Maintenance

• Real-world formulas, material data, and interactive diagrams

🤖 AI Project Assistant

• Streaming LLM chat (GPT-4, Claude, Gemini via OpenRouter)

• Context-aware project guidance and cost estimates

• AI Material Finder — snap a photo to identify materials

• Conversation history and management

📋 Project Planner

• Create and organize home improvement projects

• Save calculator results directly to projects

• Track total costs across multiple calculations

• Add notes, timelines, and organize by room

• Share with contractors or family

🏆 Gamification

• XP rewards for calculations, projects, and AI usage

• Multi-tier levels — DIY Starter, Apprentice, Pro, Master

• Achievement unlocking with Lottie animations

• Daily streaks with freeze mechanics

• Global leaderboard with pagination

💳 Subscription & Monetization

• In-App Purchase (IAP) for iOS and Android

• Stripe integration for web payments

• 7-day free trial with full access

• Monthly and yearly subscription plans

• Paywall UI, receipt verification, restore purchases

🔐 Authentication

• Email/password with OTP verification

• Google Sign-In & Apple Sign-In

• JWT access + refresh tokens with auto-refresh

• Forgot/reset password flow

⚙️ More Features

• Offline Mode — all calculators work without internet (Hive caching)

• Multi-Language — English, Spanish, Chinese; add more via JSON

• Dark & Light Theme — Material Design 3, single-file rebranding

• Push Notifications — Firebase Cloud Messaging (FCM)

• White-Label Ready — change name, colors, icons in one config file

🛠️ Tech Stack

📱 Mobile App (Flutter)

• Flutter 3.x / Dart 3.0+

• State management: Riverpod + Provider + BLoC

• Navigation: GoRouter · HTTP: Dio + Retrofit

• Local DB: Hive · Secure Storage: FlutterSecureStorage

• Animations: Lottie + flutter_animate

• Payments: in_app_purchase · Notifications: Firebase FCM

• i18n: easy_localization (EN, ES, ZH)

⚙️ Backend (NestJS)

• NestJS 11 (TypeScript) · PostgreSQL · Redis

• AI: OpenRouter (GPT-4, Claude, Gemini)

• Payments: Stripe · Storage: Cloudflare R2 · Email: AWS SES

• Modules: Auth, Users, Tools, Projects, AI, Subscriptions, Gamification

🌐 Landing Page (React)

• React 19 + TypeScript · Vite 6 · Tailwind CSS 3

• Privacy, Terms, Cookie Policy pages included

• CI/CD via GitHub Actions

📦 What's Included

• 📱 Full Flutter source code (iOS + Android)

• ⚙️ NestJS backend API — all modules, guards & migrations

• 🌐 React landing page

• 📖 CONFIG.md — complete white-label guide

• 🛠️ BUILD.md — App Store & Play Store deployment guide

• 👨‍💻 DEVELOPER_GUIDE.md — how to add/modify calculators

• 📋 Pre-written App Store & Play Store listing texts

• 🔄 Free lifetime updates + 24–48h support

✅ Requirements

• Flutter 3.0.0+ / Dart 3.0+

• Android API 21+ (Android 5.0+) · iOS 14+ / Xcode 14+

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

✅ Already live on Apple App Store (ID: 6740043929) & Google Play  |  🌐 Demo: handymeld.infoinlet.com