Card Number Validator is a free Android app developed by Tomfusion. This app is a great tool for anyone who wants to verify the validity of their debit and credit card numbers. The app uses the Luhn algorithm to determine if the number is valid, and it can identify most card types including American Express, Master Card, Visa/Visa Electron, Diners Club, Discover, Solo, Dankort, InterPaymnet (TM), and more.

The app is easy to use and provides a simple and efficient way to check the validity of your card numbers. It is important to note that the app does not store or transmit card numbers, and it only verifies the card number validity, not if the number is fake. While not all card types will be identified, this app is still a useful tool for anyone who wants to quickly and easily check the validity of their card numbers.