Retrieve Billing Data from Vyapar App

I am looking for a skilled freelancer to develop a project that retrieves billing data from authorized Vyapar accounts. The system should extract invoices, bills, product rates, quantities, customer details, and other relevant business information. The data should be retrievable in any format or from any supported platform, including Excel, CSV, JSON, XML, PDF, SQL databases, APIs, cloud storage, desktop, web, Android, and iOS. The ideal candidate should have experience in data retrieval, integration, and analysis. The project requires proficiency in Windows App Development, Android App Development, and iOS Development.