UDYOG is a GST billing and invoicing software designed for Indian businesses, including retailers, traders, and micro, small, and medium enterprises (MSMEs). Its primary function is to enable users to create GST compliant invoices quickly, with a notable voice billing feature that accepts commands in Hinglish (a mix of Hindi and English). The platform also handles inventory management, payment tracking, and collaboration with chartered accountants (CAs). It is used by over 5,000 Indian businesses and offers a 14 day free trial without requiring a credit card. The software includes several core capabilities. It automatically calculates CGST, SGST, and IGST, applies HSN codes, generates e way bills, and exports invoices as PDFs. A live dashboard provides real time views of sales, purchases, receivables, and payables through visual charts. Inventory tracking updates stock levels automatically with each sale or purchase and sends low stock alerts. Users can send payment reminders via WhatsApp with a single tap. The CA collaboration feature gives accountants a dedicated portal to view financials, file GST returns, and generate reports. Additional features include item variants (size, colour, design), bulk invoice creation, seasonal inventory reports, equipment check in and check out tracking, automatic late fee calculation, GST on rental services (SAC 997319), 5 percent GST on restaurant food with table wise billing, and daily sales summary reports. Typical use cases involve a business owner or staff member creating invoices by speaking a command such as "Ramesh ko 10 shirt ka bill banao, 500 rupaye wali" into the voice billing AI called Maya. The system then generates a complete GST invoice in approximately three seconds, eliminating the need for typing, manual calculations, or accounting knowledge. The workflow begins with account creation in under 60 seconds using a business name and GSTIN. Users then add products, parties, and bank details, either by importing from Tally or starting fresh. After setup, voice commands or traditional input can be used for daily billing, inventory management, and payment follow ups. Technical details include that the Maya AI voice billing feature is not included in the Basic plan. The software is built specifically for Indian tax compliance and works without requiring prior accounting training. No credit card is needed to start the trial, and users can cancel at any time. The platform supports both Hindi and Hinglish voice input and is accessible to users without accounting knowledge.