Inventory software is a classic case of "almost fits". Generic tools assume one warehouse, or no variants, or no transfers, or they charge per SKU. Spreadsheets fit perfectly until two people edit them at the same time.
Here is how to build an inventory system that matches how your stock actually moves.
The data model that never breaks
The secret of reliable inventory is simple: never edit the stock number directly. Record movements, and calculate stock from them.
| Table | What it holds |
|---|---|
| Products | SKU, name, category, cost, price, minimum stock |
| Locations | Warehouses, stores, vans |
| Movements | Product, location, quantity (+/−), type, reason, who, when |
| Suppliers | Contact, lead time |
| Purchase orders | Supplier, items, status, expected date |
Stock per location is a sum of movements. Every number has a history, and every mistake can be traced.
Build it in one prompt
Paste the prompt below into AITIZER. It creates the tables with the right column types, the relations between them, and screens for each role: a quick "register movement" screen for the warehouse, a stock overview for managers, and a purchase order board.
Alerts that actually reach you
Add an automation: when a product's stock falls below its minimum, send a Slack or WhatsApp message and draft a purchase order. You can also schedule a daily stock summary by email.
Mobile for the warehouse floor
Publish the app and install it on warehouse phones as a PWA. Big buttons, one form, done. You can also ship an Android build.
Connect the rest of the business
Sync orders from Shopify, WooCommerce or your ERP with ready integrations, or (on Pro) expose the inventory through the REST API and MCP so other tools. And AI assistants. Can check stock.
Cost
An inventory app needs more than the Free plan's 3 tables, so plan on Starter ($29/month) to publish it, or Pro ($79/month) for WhatsApp alerts, your own domain and the full API. Both start with a 7-day trial.
Build it on AITIZER. Free, no card
Paste this into the composer and watch it ship:
Build an inventory app. Products with SKU, category, cost and price; stock per warehouse; stock movements (in, out, transfer) with a reason; purchase orders to suppliers with status. Alert me on WhatsApp when stock goes below the minimum. Warehouse staff can only register movements.
- Real Postgres tables you own and can export
- AI agents on WhatsApp, Telegram and web chat
- Publish to your domain, or as a PWA, Android and desktop app
