Shopify is excellent at selling and adequate at operating. The gap — the math your business runs on that Shopify has no field for — is where Google Sheets earns a permanent place next to the admin. The original 2024 version of this post showed one live example; this update keeps the pattern and adds the boundary line learned from running these in production.
Three pieces, whatever the use case:
A sheet is the right tool while a human reviews the output and the sync interval is faster than the decisions it feeds. It's the wrong tool the day any of these become true: nobody has opened it in a month but it still writes to Shopify; an oversell traces back to the interval; a second location needs the same numbers; the Apps Script has grown an onEdit nobody understands anymore. Each of those is the signal to move the logic into a small app — webhooks instead of intervals, Postgres instead of tabs, and an alert when it breaks instead of silence. The sheet version is still the right way to start: it proves the logic cheaply before anything gets built.
Tell me what you need and I'll tell you what it takes.
Or run a free teardown of your store first.
Tell me what you're working on. I'll reply within a business day.