If you’d like a real inventory tool and don’t want to pay month-to-month fees—or give up the comfort of Google Sheets—this is the one. I created a complete IMS on top of a spreadsheet with Google Apps Script.
It works on a personal Gmail account or a Google Workspace (business) account, stores all data in your own spreadsheet, and introduces features that most individuals and small businesses actually need.
You can test the web app here: IMS Web App
Get the app here: