Comprehensive Android App for Livestock Management

I'm in need of an Android mobile app primarily focused on inventory management for feed and livestock. The app should have a multifaceted approach, integrating features such as:

- Salary calculations, including PF and ESI

- Accounting and GST calculations

- PDF bill generation

- Managing customer orders and deliveries

- Payment integration via Bank transfers, QR code, and UPI

- GPS location mapping

The ideal candidate for this project should have extensive experience in mobile app development, particularly for Android, with a strong background in inventory management systems. Proficiency in integrating various payment methods and GPS mapping is essential. Knowledge in accounting and salary calculation software will be a great advantage. Please, be prepared to showcase similar apps you've developed in the past.