Bank of Papa — Teach Kids Compound Interest

About Bank of Papa

Bank of Papa is a free family savings app that teaches kids how compound interest works — through experience, not explanation. Parents set a custom annual interest rate (like 5% or 10%), record the child's deposits (birthday money, allowances, chore payments, gifts), and kids watch their balance grow every single day. The money tree visual makes the abstract concrete: your money makes money while you sleep.

Unlike spreadsheets or abstract math lessons, Bank of Papa is designed to be used together. A parent opens the app, shows a child their current balance, and lets them calculate how much their birthday money will be worth in a year. Real numbers, real stakes, real excitement. Financial literacy through daily habit, not one-time lecture.

Everything runs in the browser — no account required, no data collected, no ads, no in-app purchases. The app works offline after the first load. It's a PWA you can add to the home screen and revisit every morning to check the overnight growth.

Frequently Asked Questions

What is Bank of Papa?

Bank of Papa is a free family savings simulator where parents set custom interest rates and kids watch their money grow through compound interest. Record birthday money, allowances, and gifts — no account required.

How does compound interest work in Bank of Papa?

Parents set an annual interest rate (for example 5% or 10%). The app calculates daily compound interest on the balance and shows kids exactly how much their money earned overnight. The money tree visual grows as savings increase.

Is Bank of Papa free?

Yes. Bank of Papa is completely free to use. No subscription, no ads, no in-app purchases. The full app is available at no cost, forever.

What age is Bank of Papa designed for?

Bank of Papa works best for children aged 5 and up, with a parent setting up and managing the account together. The simple balance display and money tree visual make it engaging even for young children who are just learning about saving.

Does Bank of Papa work offline?

Yes. Bank of Papa is a Progressive Web App (PWA). Once loaded, it works offline. You can add it to your phone's home screen and open it any time, even without an internet connection.

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