StockOS

What it does

Billing

GST tax invoices on a phone, quotations that convert to invoices, sales returns (credit notes), walk-in cash sales, rates with or without GST, line discounts, round-off, and vehicle and transporter details.

GST

CGST and SGST or IGST chosen from the place of supply, every slab including GST 2.0, GSTIN checksum validation, HSN on every line, and a Bill of Supply when you are unregistered.

Stock

Items with HSN, units, reorder levels and barcodes; several godowns with transfers; batches with expiry sold earliest-expiry-first; moving-average cost; count adjustments with reasons; full movement history; low-stock and expiry alerts.

Purchases

Purchase bills add stock with batch and expiry, update the cost price and record the supplier's bill number; purchase returns as debit notes.

Money

Receipts and payments matched to the oldest unpaid invoices automatically, part-paid and overdue status, printable party statements, credit days and limits, and WhatsApp payment reminders.

Sharing

Every invoice has a private link to send on WhatsApp. Your customer opens it on their phone and pays by UPI with the amount filled in; the UPI QR code is printed on the invoice too.

Reports

GSTR-1 (B2B, B2CL, B2CS, credit notes, HSN summary), the GSTR-3B summary with input credit, sales and purchase registers, stock valuation, receivables ageing and item-wise profit, all exportable as CSV for your CA.

Team

Roles for Admin, Manager, Accountant, Sales and Storekeeper. Sales staff never see costs or margins. An audit log of every change.

Tested: 15 automated tests on the GST, stock and books engine, and 25 end-to-end tests covering every page for every role.