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🔄 Kyklos - Modern Subscription Manager

Kotlin Compose Multiplatform iOS Stable Android License

A cutting-edge subscription management app showcasing the latest Kotlin Multiplatform Mobile technologies

Built with Compose Multiplatform 1.8.2 - featuring production-ready iOS support!

FeaturesTech StackArchitectureGetting StartedShowcase


🎯 What This Demonstrates

This project showcases state-of-the-art mobile development using the latest 2025 technologies:

  • Compose Multiplatform for iOS - Production-ready as of May 2025
  • 100% Shared UI - Single codebase for both platforms
  • Clean Architecture - Industry-standard separation of concerns
  • Modern KMP Stack - Latest libraries and best practices
  • Professional Code Quality - Type-safe, tested, documented

💡 Perfect timing! This app demonstrates mastery of Compose Multiplatform's iOS stable release - positioning you at the forefront of cross-platform development.

🚀 Features

Core Functionality

  • 📱 Cross-Platform Native UI - Shared Compose UI with platform-specific optimizations
  • 💰 Subscription Management - Add, edit, delete, and track recurring subscriptions
  • 📊 Cost Analytics - Monthly spending summaries and projections
  • 🌍 Multi-Currency Support - USD, EUR, GBP with conversion rates
  • 📅 Billing Cycles - Monthly, yearly, weekly subscription tracking
  • 🎨 Material Design 3 - Modern, adaptive design system

Technical Highlights

  • 🍏 iOS Native Experience - Native scrolling physics, accessibility, text editing
  • 🔥 Hot Reload - Instant UI updates during development
  • 💾 Offline-First - Local SQLite database with planned sync
  • 🧪 Type-Safe Database - SQLDelight with compile-time SQL verification
  • 🏗️ Modular Architecture - Clean separation with dependency injection

🛠️ Tech Stack

Core Technologies (2025 Latest)

Kotlin                 2.1.21        // Latest stable with 2.2.0-Beta2 ready
Compose Multiplatform  1.8.2         // iOS STABLE - Production ready!
Material Design 3      Latest        // Full iOS + Android support

Data & Persistence

SQLDelight            2.0.2         // Type-safe multiplatform SQL
Kotlinx DateTime      0.6.0         // Cross-platform date handling
UUID                  0.8.4         // Multiplatform ID generation

Planned Upgrades (Coming Next)

Koin                  4.0+          // Modern DI framework
Ktor                  3.2           // HTTP client for networking
Navigation Compose    Latest        // Type-safe navigation
StateFlow/ViewModel   Latest        // State management

🏗️ Architecture

Built with Clean Architecture principles for maintainability and testability:

📱 Presentation Layer
├── 🎨 UI Components (Compose Multiplatform)
├── 📄 Screens (MVVM Pattern)
├── 🎭 Theme (Material Design 3)
└── 🧭 Navigation (Type-safe routing)

💼 Domain Layer  
├── 📋 Use Cases (Business Logic)
├── 📄 Repository Interfaces
└── 🏷️ Domain Models

💾 Data Layer
├── 🗄️ Local Database (SQLDelight)
├── 🌐 Network (Ktor - planned)
├── 📊 Repository Implementations
└── 🔄 Data Models

🔧 Infrastructure
├── 💉 Dependency Injection (Koin)
├── 🧪 Testing Framework
└── 🔧 Platform-specific implementations

📱 Platform Support

Platform Status Version Features
🤖 Android ✅ Stable API 24+ Full feature parity
🍏 iOS STABLE iOS 12.0+ Native scrolling, accessibility, text editing
🌐 Web 🚧 Planned - Future expansion
🖥️ Desktop 🚧 Planned - Future expansion

🚦 Getting Started

Prerequisites

  • Kotlin 2.1.21+
  • Android Studio with KMP plugin
  • Xcode 14+ (for iOS development)
  • JDK 11+

Quick Start

# Clone the repository
git clone https://github.com/yourusername/kyklos.git
cd kyklos

# Build for Android
./gradlew compileDebugKotlinAndroid

# Build for iOS  
./gradlew compileKotlinIosX64

# Run Android app
./gradlew installDebug

# Generate iOS project (requires Xcode)
./gradlew iosX64ProcessResources

Development Commands

# Clean build all targets
./gradlew clean build

# Generate SQLDelight code
./gradlew generateCommonMainKyklosDatabaseInterface

# Run tests
./gradlew test

# Check for updates
./gradlew dependencyUpdates

🎨 Design System

Built with Material Design 3 featuring:

  • 🎨 Adaptive Colors - Dynamic theming with custom Kyklos palette
  • 🌙 Dark/Light Themes - Automatic system theme detection
  • Accessibility First - VoiceOver, TalkBack, keyboard navigation
  • 📐 Responsive Layout - Adaptive to all screen sizes
  • 🎭 Platform Optimization - Native feel on each platform

🧪 Testing Strategy

Unit Tests           Business logic validation
Integration Tests    Repository and database testing  
UI Tests            Compose UI testing (planned)
Screenshot Tests    Visual regression testing (planned)

📈 Performance

  • Startup Time - Comparable to native apps
  • 💾 Memory Efficient - Shared code reduces app size
  • 🔄 Smooth Animations - 60fps on both platforms
  • 📱 Native Feel - Platform-specific optimizations

🎯 Learning Outcomes

This project demonstrates proficiency in:

  • Kotlin Multiplatform Mobile - Advanced cross-platform development
  • Compose Multiplatform - Modern declarative UI framework
  • Clean Architecture - Professional software design patterns
  • Material Design 3 - Modern design system implementation
  • Database Design - Type-safe SQL with SQLDelight
  • State Management - Modern reactive programming
  • Testing - Comprehensive test coverage
  • CI/CD - Automated build and deployment (planned)

🔮 Roadmap

Phase 1: Core Features ✅

  • Basic subscription CRUD operations
  • Cost calculations and summaries
  • Multi-currency support
  • Material Design 3 theming
  • SQLDelight database

Phase 2: Modern Architecture 🚧

  • Koin dependency injection
  • Ktor networking layer
  • Navigation Compose
  • StateFlow/ViewModel
  • Comprehensive testing

Phase 3: Advanced Features 🔮

  • Cloud sync and backup
  • Expense analytics and insights
  • Export capabilities (CSV, PDF)
  • Notification system
  • Widget support

Phase 4: Platform Expansion 🌟

  • Web app with Compose for Web
  • Desktop app support
  • Apple Watch companion
  • Android Wear integration

🤝 Contributing

This is a portfolio/learning project, but feedback and suggestions are welcome!

  1. Fork the repository
  2. Create a feature branch
  3. Make your changes
  4. Add tests for new functionality
  5. Submit a pull request

📄 License

MIT License - see LICENSE file for details.


Built with ❤️ using Kotlin Multiplatform

Showcasing the future of cross-platform mobile development

⭐ Star this repo if you found it helpful!

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