M Tools is world's first App which can read, charge your Mifare Classic and Ultralight card directly. Also it's the world's first mifare card charger which can work on NFC, PN53X and ACR122U. With M Tools, you can even compare and explore the rules of datas. The keys and data rules should be known first. Available functions: 1. Read and write to sector directly. 2. Auto save keys if they changed 3. Compare data, highlight display. 4. Emulate calculate. 5. Multi-card & multi-rules. 6. Crc8 & Crc16 calculation support.