Invoice Pro is a professional-grade Android invoice and billing application built for small businesses, freelancers, and shop owners who need a reliable offline invoicing solution.

The app works completely offline and does not require internet access, user login, or cloud services. All invoices, customers, products, and settings are securely stored on the device using a local SQLite database.

Users can create invoices, manage customers and products, apply discounts and taxes, and export clean, print-ready PDF invoices in A4 format. A flexible tax system and multi-currency support make the app suitable for global usage.

Invoice Pro focuses on simplicity, performance, and reliability, making it ideal for everyday business invoicing needs.

• Create, edit, and delete invoices
• Customer management
• Product and service catalog
• Automatic total, tax, and discount calculation
• Flexible tax label and tax rate configuration
• Multi-currency support
• Invoice status tracking (Draft, Unpaid, Paid)
• Offline PDF invoice export (A4 format)
• Share invoices using Android share options
• Light and dark theme support
• 100% offline functionality
• No login, no internet required

• Android Studio Hedgehog or later
• Android SDK 26 or higher
• Kotlin 1.9+
• Basic Android development knowledge

1. Open the project in Android Studio
2. Let Gradle sync complete
3. Run the app on an emulator or physical device
4. Configure company and invoice settings
5. Start creating and exporting invoices