💰 Mocca

Mocca is a modern Android application for mobile and Wear OS that simplifies money transfer cost calculations. Based on Efecty rates, it provides a clean, fast, and reliable way to calculate fees and total costs on the go.

✨ Features

• 💰 Smart Calculator: Real-time fee calculation with range validation.
• 🕒 History: Keep track of your successful calculations locally.
• ⌚ Wear OS Support: A streamlined version optimized for your wrist.
• 🎨 Material 3: Full support for Dynamic Colors and Adaptive Layouts.
• 🌓 Theme Support: Seamless switching between Light and Dark modes.

📸 Screenshots

🏗 Architecture

The project is built using modern Android development standards:

• Pattern: MVVM (Model-View-ViewModel) + UDF (Unidirectional Data Flow).
• Modularization: Feature-based modular structure for high scalability.
• Concurrency: Kotlin Coroutines and Flow for reactive data streams.

flowchart BT
  subgraph Core
  fcc[":features:core:calculator"]
    fcd[":features:core:database"]
    fcp[":features:core:preferences"]
    fcu[":features:core:ui"]
  end
  subgraph Mobile
    fmu[":features:mobile:ui"]
    fmc[":features:mobile:calculator-*"]
    fmo[":features:mobile:onboarding"]
    fms[":features:mobile:settings"]
    appm[":apps:mobile"]
    bmm[":benchmarks:macro:mobile"]
  end
  subgraph WearOS
    fwu[":features:wearos:ui"]
    fwc[":features:wearos:calculator-*"]
    fwo[":features:wearos:onboarding"]
    appw[":apps:wearos"]
    bmw[":benchmarks:macro:wearos"]
  end
  Core --- Mobile
  Core --- WearOS
  fmu --- fmc
  fmc --- appm
  fmo --- appm
  fms --- appm
  fwu --- fwc
  fwc --- appw
  fwo --- appw
  appm --- bmm
  appw --- bmw

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🛠 Tech Stack

The application is built with the following cutting-edge technologies:

• Language: Kotlin 2.4.0
• UI Framework: Jetpack Compose BOM 2026.06.00
• Dependency Injection: Koin BOM 4.2.2
• Navigation: Jetpack Navigation 2.9.8
• Local Database: Room 2.8.4
• Data Storage: DataStore 1.3.0-alpha09
• Adaptive Layouts: Material 3 Adaptive 1.2.0
• Wear OS: Compose for Wear OS 1.6.2
• Infrastructure: Android Gradle Plugin 9.2.1

📂 Project Structure

• apps/: Main entry points for :mobile and :wearos.
• features/core/: Shared business logic, :calculator rules, :database persistence, and shared :ui components.
• features/mobile/: Mobile-specific feature modules like :calculator-fees, :onboarding, and :settings.
• features/wearos/: Wear OS-specific feature modules like :calculator-fees, :onboarding, and :ui.
• benchmarks/: Macrobenchmark tests for performance monitoring on both :mobile and :wearos.
• build-logic/: Custom Gradle convention plugins for project configuration.

🚀 Getting Started

1. Clone the repo: git clone https://github.com/marlonlom/mocca.git
2. Open in Android Studio Ladybug (or later).
3. Sync Gradle and run the :apps:mobile or :apps:wearos module.

🤝 Documentation

• Contributing: Guidelines for contributing to the project.
• Code of Conduct: Community standards and expectations.

📄 License

Copyright 2023 Marlonlom

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    https://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.