Know at any time how much money you have left at the end of the month, without a complicated spreadsheet. This prompt has ChatGPT build a small household budget app in a single file that works offline.

• Choose your currency (euro, Swiss franc, Canadian dollar…) on first launch.

• Enter income and expenses: money left, per person and per day, is calculated automatically.

• Quarterly or yearly expenses become a monthly provision.

• One bar per category shows where the money goes, compared with the previous month.

• Each new month carries over your recurring bills: nothing to re-enter.

• Your figures stay on your device: nothing is sent online, and you can back them up to a file.

Free, optimized for ChatGPT. The app interface is in French.