This is exactly the same version of MIFARE Classic Tool (MCT) as the free one! (Except it will not show the donate notice at startup/updates.) If you like MCT and want to support the developer, please consider to buy this app. You will get the exact same version of MCT but in addition, a good feeling for supporting free and open source software ;) For screenshots and more information about MCT see: https://play.google.com/store/apps/details?id=de.syss.MifareClassicTool MIFARE® is a registered trademark of NXP Semiconductors.