Google turned your spreadsheet into an app. I tested it on a mortgage scenario planner.

TL;dr: In its September Workspace Drop, Google added Sheets canvas, which turns a spreadsheet into an interactive mini-app with one click. You describe what you want in plain language, Gemini builds the layout, and it lives as a tab in the workbook, synced to the sheet in real time. Google's own example was a financial scenario planner, so I built one to test it: a mortgage-rate scenario planner ahead of the Bank of Canada's October 28 decision. The setup, the prompting, and the honest limits...