Mifare Classic Tool 2.3.1 -

The app doesn't just "crack" the card; it listens to the conversation between your phone's NFC chip and the card, deduces the secrets, and allows you to rewrite sectors.

The tool can compare the data between two different tags or different saves of the same tag to identify where specific values (like a balance or an ID number) are stored. mifare classic tool 2.3.1