naseerah02/Kakeibo-tracker ? reverse-engineered prompt

Build me a private family expense tracker app that works on Android and also installs like a proper home screen app.

I want people to be able to add an expense in just a few taps, even when they are offline, and have it sync later to one shared Google Sheet that I own. Each phone should sign in once with an emailed 6 digit code, then unlock with a PIN or fingerprint every time it opens. Please include a clean add expense flow, a history screen where entries can be edited or deleted, and a month summary with totals, budget warnings, and a Kakeibo style breakdown for Needs, Wants, Culture, Extra, and Savings.

It should also support recurring expenses, custom funds like Zakat or emergency savings, simple reflection questions, and weekly and monthly summary emails. Make the app bilingual with English and Urdu, right to left when Urdu is on. If you need current Google Apps Script or web app details, look up the latest docs online and use sensible defaults.