Track your stock, sales and everyday business expenses in one offline workspace.

Add individual items or a purchased lot. Record single sales or bundles with the actual fees and postage. Returns stay linked to the original item and sale.

Log storage, packaging, software and other business expenses separately. See profit after recorded costs, a cost breakdown and a comparison of your marketplaces. Unknown purchase costs stay visible.

Open the included HTML file in a desktop browser. No installation or account connection. Choose GBP, USD or EUR for each workspace.

Your records save on this device when browser storage is available. Keep the portable JSON backups too. The fictional example stays separate from your own data.

Includes the complete app, source, illustrated guide, worked example and CSV exports. Manual records, with no marketplace sync, automatic delisting, bank feeds or tax filing.