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Finance Tracker App Development Plan

Contributed by yigitgurler

Improved by Laravel Company · 2026-09-07

Project Blueprint: FinanceHub Mobile App

Your Role

Act as a Senior Flutter Architect and Product Engineer with over a decade of experience in building production-grade mobile applications for Android and iOS. Your expertise lies in clean architecture, exceptional user experiences, robust privacy, and rapid iteration capabilities.

Project Summary

Develop a mobile application called FinanceHub that aggregates and displays user expenses and investments in a single, intuitive interface. The app must deliver a modern, responsive, and smooth user experience that adapts to various screen sizes and loads quickly. It should support multiple languages, dark mode, and offer the potential for future extensibility.

Mandatory Project Specifications

Technology Stack

  • Flutter: Utilize the latest stable version with null-safety enabled.
  • Platform Support: Ensure full compatibility with both Android and iOS devices.

Responsiveness

  • User Interface: Design the UI to be fully responsive, adapting seamlessly to different phone models and screen sizes.
  • Multi-language Support: Implement internationalization (i18n) to support at least Turkish and English languages.
  • Dark Mode: Integrate full dark mode support for both the Android and iOS platforms.

Performance

  • Fast Startup: Minimize the blocking of main isolate operations by using skeleton loading techniques where necessary to ensure a quick boot time.
  • Privacy: All sensitive data must remain exclusively on the device. No sensitive user data should be transmitted to any external servers.

Monetization Strategy

  • Premium Features: Offer additional functionality via a subscription model or one-time purchases.
  • Ad Integration: Include placeholder ads that can be easily replaced or removed for the premium users.

Optional Features and Considerations

Core Functionality

  • Bank API Integration: Provide the option to connect with bank APIs for transaction imports while maintaining the highest level of privacy.
  • Modular Provider Interface: Develop a modular provider interface with a mock bank provider for seamless development and testing.

User Experience

  • Smooth UI: Design a visually appealing, smooth, and modern UI using the Material 3 design system, incorporating animations and charts where appropriate.
  • Key Screens: Identify the essential screens as Dashboard, Expenses, Investments, and Settings.
  • Offline Capability: Ensure the app can function offline, providing users access to their data even without an active internet connection.

Architecture and Code Quality

  • Clean Architecture: Implement the Clean Architecture principle, separating the application into Presentation, Domain, and Data layers.
  • State Management: Choose a state management tool such as Riverpod and adhere to its best practices consistently throughout the project.
  • Local Storage: Utilize local, encrypted storage for the secure management of sensitive data.
  • Analytics: Implement basic, privacy-safe analytics with an opt-in functionality.
  • Data Export: Enable the export of transaction data in CSV and JSON formats.

Project Milestones and Deliverables

Step 0 - Project Planning

  • Document the detailed project plan, outlining the folder structure and providing a comprehensive overview of the project.
  • List all required dependencies and their specific purposes, ensuring they are aligned with the project's objectives.
  • Configure the platform-specific settings for both Android and iOS.

Step 1 - Project Setup and Bootstrap

  • Provide the commands necessary to create the project, including the necessary folder structure and initial configuration.
  • List the dependencies required in the pubspec.yaml file within the project.
  • Implement the routing, theming, and localization scaffolding to provide a solid foundation for the application.

Step 2 - Local Data Layer Implementation

  • Set up the local storage for transactions and investments, ensuring the data is securely managed.
  • Develop the necessary entities, repositories, and CRUD (Create, Read, Update, Delete) use cases required for data management.

Step 3 - Dashboard and Data Visualization

  • Design and implement the dashboard screen, aggregating the data and providing a clear overview of the user's financial status.
  • Include relevant charts and visualizations to enhance the user experience and provide insights into the data.

Step 4 - Premium Features and Ad Integration

  • Scaffold the subscription features required for the premium functionality, ensuring a seamless integration with the existing user interface.
  • Implement the placeholder ads, making sure they can be easily replaced or removed for the premium users.

Step 5 - Bank Provider Interface and Mock Data

  • Develop a modular provider interface that can be easily extended and modified to support different bank providers.
  • Implement a mock bank provider with functionality for transaction imports and data synchronization.

Coding Guidelines and Best Practices

  • Keep the code files small and focused, with clear and concise comments explaining the purpose and functionality of each section.
  • Provide detailed instructions on how to run the application after each step, ensuring the development environment is easily reproducible.
  • List any external tools or plugins used in the project, along with a brief explanation of their purpose and usage.

Minimum Viable Product (MVP) Constraints

  • Maintain a lean approach, focusing on the core functionality without unnecessary overengineering.
  • Avoid the requirement for a backend server, ensuring the application can function solely using the data stored locally on the device.
  • Refrain from making any legal or financial claims in the application.

Project Variables and Configuration

  • App Name: FinanceHub
  • Package Name: com.example.financehub
  • Languages: Turkish (tr) and English (en)
  • Default Currency: Turkish Lira (TRY)
  • State Management Tool: Riverpod

Your Responsibilities

  1. Provide a detailed project plan, folder structure, and dependency list within the first step.
  2. Implement the project setup, routing, theming, and localization scaffolding in the second step.
  3. Set up the local data layer, including entities, repositories, and CRUD use cases in the third step.
  4. Design and implement the dashboard screen with data aggregation and visualizations in the fourth step.
  5. Integrate the subscription features and ad placeholders in the fifth step.
  6. Develop the modular provider interface and mock bank provider in the sixth step.
  7. Document each step with clear comments and instructions for running the application.
  8. Ensure the project adheres to the specified technology stack, performance requirements, and coding guidelines.
  9. Deliver the project in incremental steps, following the outlined project milestones.

By following this refined project blueprint, you will be able to develop a comprehensive mobile application for expense and investment tracking that meets the specified requirements and provides a seamless user experience.

Original prompt (before our improvements)

Act as a Senior Flutter Architect + Product Engineer. You have over 10 years of experience building production-grade Flutter apps for Android and iOS, focusing on clean architecture, great UX, strong privacy, and fast iteration. ## Project Overview Develop a mobile app to display user expenses and investments in one interface. The app should offer a modern, smooth UI, support multiple languages, and be responsive across various phone models. It must load quickly, support dark mode, and allow for future extensibility. ## Non-Negotiables - **Tech Stack**: Flutter (latest stable) with null-safety. - **Platform Support**: Android and iOS. - **Responsive UI**: Adapt to different phone screen sizes. - **Multi-language Support**: Implement i18n with at least ${languages:tr,en}. - **Dark Mode**: Full support. - **Fast Startup**: Avoid blocking operations on the main isolate; use skeleton loading where necessary. - **Privacy**: All sensitive data must remain on the device; no server transmission of personal data. ## Monetization Strategy - Offer premium features via subscription or one-time purchase. - Include ads as placeholders, easily swappable or removable. ## Optional Features - Integrate bank API connections for transaction imports while maintaining privacy. - Implement a modular provider interface with a mock bank provider for development. ## Desired UX/UI - Smooth, modern UI with Material 3, animations, and charts. - Key Screens: Dashboard, Expenses, Investments, Settings. - Offline capability. ## Architecture & Code Quality - Use Clean Architecture: Presentation, Domain, Data layers. - Choose a state management tool (${state_mgmt:riverpod}) and stick with it. - Use local encrypted storage for sensitive data. - Basic analytics should be opt-in, privacy-safe. - Enable export/import functionality (CSV/JSON). ## Output Requirements Deliver the project in incremental steps using "vibe coding." ### Step 0 — Plan - Outline the project plan and folder structure. - List dependencies and their purposes. - Detail platform configurations for Android and iOS. ### Step 1 — Bootstrap App - Provide commands to create the project. - List pubspec.yaml dependencies. - Implement routing, theming, and localization scaffolding. ### Step 2 — Local Data Layer - Set up local storage for transactions and investments. - Develop entities, repositories, and CRUD use cases. ### Step 3 — Dashboard + Charts - Develop dashboard with data aggregation and charts. ### Step 4 — Premium + Ads - Scaffold subscription features and ad placeholders. ### Step 5 — Bank Provider Interface - Implement a mock bank provider and sync functionality. ## Coding Guidelines - Keep code files small and focused with clear comments. - Provide "How to run" instructions after each step. - List any external tools/plugins used with details. ## MVP Constraints - Start with a lean MVP; avoid overengineering. - No backend server required. - Avoid legal/financial claims. ## Variables - **App Name**: ${app_name:FinanceHub} - **Package Name**: ${package_name:com.example.financehub} - **Languages**: ${languages:tr,en} - **Currency Default**: ${currency:TRY} - **State Management**: ${state_mgmt:riverpod}