An LPG dealer needed HisabMate.pk to understand their trade. The owner must know which customer holds how many empty cylinders, while gas itself is billed by weight.
LPG sale at the till: gas billed by kg, cylinders filled out and empties backCustomer cylinder ledger: how many cylinders each customer holds
Screens from the live app, shown with sample data.
THE PROBLEM
What was getting in the way?
Gas is billed in kg; cylinders are assets that move between shop and customer.
Empty cylinders held by customers were not visible on bills or statements.
The change could not risk the sale functions other businesses already rely on.
WHAT WAS BUILT
The delivered solution
Cylinder panel at the till and a cylinder ledger for each customer.
Cylinders printed on the bill and the customer statement.
Three new reports in kg, a stock check and Urdu labels.
Offline-safe retry queue for cylinder entries.
HOW
How it was delivered
Three phases — database, app, reports — in about two days. One new table and four database functions carry the cylinder logic, and the existing sale functions were left unchanged, so nothing else could break. Each phase was tested in a real browser before release.