CardLab turns credit card math into a practical app
CardLab is an app for testing and calculating credit card situations before they happen. It is designed to follow the real math used by card issuers for , , rewards versus interest, installment payments, , , and foreign transaction fee scenarios. It includes presets for 40 countries and for more than 40 countries.
It is aimed at people who manage several credit cards from different banks. A “cover for a friend” option marks a transaction as money owed by a friend and lets the user set payment reminders. The app does not require bank logins or real card numbers, and the data stays on the device.
More work is planned for the screen design and user flow.
Key points
- CardLab lets users simulate common credit card situations in one app.
- It covers , , interest, rewards, installment payments, , , and foreign transaction fee cases.
- It supports 40 country presets and for more than 40 countries.
- It includes a way to track card spending done on behalf of a friend and set repayment reminders.
- It does not ask for bank logins or real card numbers, and data stays on the device.