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.
Version 4.0.2:
• Various minor improvements (layout, usage, code base).
• Updated Chinese translation. Thanks to "Nkh0472".
• Some minor bug fixes.
Version 4.0.1:
• ...
Version 4.0.0:
• Permission to read/write external storage (SD card) has been dropped.
https://www.icaria.de/mct/help-and-info/#storage
• ...
Full changelog: https://raw.githubusercontent.com/ikarus23/MifareClassicTool/master/CHANGELOG.txt