NFC ReTag PRO is the most powerful app for reusing/recycling write-protected NFC tags such as hotel key cards, access badges, price tags, lift cards, key fobs, etc.

This app is used for reusing NFC tags that have been issued for a specific use. For instance, you can use it to add an activation code for the WiFi network you are connected to or to add a code for the Bluetooth you are using.

To do this, you need to select the appropriate tag from the list that is available in the app. Once you have selected the tag, you will be able to add its activation code or Bluetooth code. 

NFC ReTag PRO can also be used to add a calendar entry for the tag. It is possible to select a specific day and time for the activation code or the Bluetooth code.