Credit Card Verifier is a free Android app developed by tricksgum that checks the validity of credit and debit card numbers. It supports all major card brands, including VISA, MasterCard, American Express, Diner's Club, JCB, and Voyager.

One of the best features of this app is that it uses the Luhn algorithm to process the card numbers, ensuring accuracy and reliability. Another great feature is that it does not collect, store, or send any entered card numbers, making it a secure option for those concerned about privacy.

Credit Card Verifier supports a variety of card types, including Visa, Mastercard, Amex, Dankort, Discover, JCB, and Switch/Solo. Overall, this app is a useful tool for anyone who needs to verify the validity of credit or debit card numbers.