Now with new features: CredCard now creates card-numbers for testing purposes, too. CredCard validates different Cardnumbers like Amex, Visa, Mastercard and much more. CredCard checks the Checksum of the card, even if you don't know if it is an Amex or Visa or whatever! No online check. Works with Palm and compatible devices with OS 3.5 and above. Take a look at our other applications, too! Have fun!