Zoho Creator Inventory Automation

I need an experienced Zoho Creator specialist to turn my outline into a complete order-and-inventory app inside Zoho One. The system must keep stock levels up-to-date in real time and push each new order through an automated workflow so manual spreadsheets disappear from the process.

Core build requirements
• Real-time inventory tracking across all warehouses and sales channels
• Automated order processing that raises packing slips and invoices the moment an order is approved

GST integration
Invoices must calculate GST automatically, using the correct Indian rates and placing those values where Zoho Books expects them. No external spreadsheet workarounds.

Workflow automation
1. Order approval chain: salesperson → manager → accounts (triggered by status changes in Creator)
2. Customer notifications: email—and ideally WhatsApp—sent at each key stage (order received, approved, shipped)

You will receive my field list, sample data and Creator environment access. Deliver a fully tested Zoho Creator app, GST-ready invoices, and concise hand-over documentation. If you have launched similar inventory solutions, a short demo video or link will help me choose quickly.