mkaltner/LoanPro ? reverse-engineered prompt

Build me a fast, simple Android loan calculator app called LoanPro.

It should let a user enter any three of loan amount, monthly payment, term, and interest rate, then tap the missing one to calculate it. I want it to feel like a calculator, so include easy number entry, percent, decimal, backspace, memory, and clear behavior. It should also handle mortgage style calculations like taxes, insurance, down payment, LTV, PMI, and bi weekly loan details, with a way to cycle through the different views from the same inputs.

Make it work fully offline with no ads, no analytics, no tracking, and no network access. Include a simple help screen or quick start guide that explains how to use it, plus a clean main screen that feels fast and easy to understand. If you need current Android docs or best practices, look them up online first.