How to track inventory and orders in one app.

The three-copies problem

Most small product businesses run the same sale through three systems: the order book (or chat thread), the inventory sheet, and the money spreadsheet. Each is reasonable alone. The problem is that the three copies are maintained by hand — and drift apart.

You see the symptoms: stock says 12 but the shelf says 7. An order is marked paid in the book but the receivables list still shows it open. The count is only trustworthy the day after a physical audit.

What "one app" actually does

When inventory and orders share one system, a sale stops being three tasks:

• Stock decrements itself. Confirm an order and inventory levels drop automatically — nothing to copy across.
• Overselling stops. The app knows what's on hand before you promise it, not after.
• Balances stay true. The order's payment status and the customer's balance are the same record, not two lists to reconcile.
• Reports appear for free. "What's selling" and "who owes me" are queries, not Saturday work.

How to set it up (a practical order)

• Import your products — names, prices, current stock. A CSV or an evening of entry is fine; you only do it once.
• Add your regular customers — especially anyone who buys on credit.
• Record the next order in the app, not the notebook. Don't backfill history — start forward.
• Close the loop: record payments against orders so receivables stay real.

Within a week the app — not the spreadsheet — is the source of truth, and the sheet becomes a read-only archive.

Where TUKO fits

TUKO is built for exactly this: inventory, orders, customers, and payments in one app — plus expenses, reports, and payroll when you need them. Free to start; works on web and mobile.