Offline retail management and point-of-sale software

A complete shop management system: point of sale, inventory across every size and colour, purchasing, customer credit, expenses and profit reporting — with an audit trail behind every transaction.
A retail counter cannot stop working because the internet does. The software had to be correct and fast with no network at all.
Off-the-shelf point of sale either assumes a cloud connection or treats stock as a single number per product, which is useless when the same item exists in six sizes and four colours.
Everything runs locally against a single embedded database file with real ACID transactions, packaged as a desktop application. Stock is tracked per variant, and the money arithmetic is auditable line by line.
Version 1.0.2 installer built and in use at the shop. Distributed directly, not through an app store.





Concept
Architecture
UI / UX
Development
Database
Testing
Deployment