MarBill — Stone GST Billing

The first billing app built around how stone is actually sold — by the square foot, one slab at a time. MarBill turns Length × Height × pieces into accurate sq.ft, applies your GST automatically, and lets you share the PDF on WhatsApp in one tap.

WHY MARBLE & GRANITE TRADERS PICK MARBILL

• Sq.ft-native line entry. Add a slab: pick variety → type L × H × pcs → area + amount appears live. Multiple pieces of the same stone roll up to one invoice line.

• GST done right. CGST + SGST for intra-state customers, IGST for inter-state — switches automatically based on your state and theirs. Round-off to the rupee, deterministic to the paisa.

• Mobile-first, no desktop required. Built for your phone. Bill while walking the godown. Send the PDF on WhatsApp from the finalized screen.

• Stock you can read at a glance. Every variety shows current sq.ft, its rate, and a colour-coded bar (red when low). Receive stock with a number, deduct it on every invoice.

• Real party ledger. See opening balance, every invoice, every payment, the running outstanding — in chronological order.

• Reports that match the month. Total sales, GST collected, top parties, top varieties, average order — by FY, by your fiscal year.

• Designed in India, for India. Indian currency formatting (₹1,23,456), Indian FY (April → March), state-code GSTIN handling.