NFC ReTag Expert Plugin is a free plugin developed by WidgApp Mobile Solutions that provides advanced features for expert users who use NFC Retag. This plugin requires the main app NFC Retag (free or pro, 2.4 or higher) and some of its activities need root and/or security-related permissions. The plugin aims to keep the main app clean and secure while providing advanced functions for expert users at once.

The Expert Plugin for NFC Retag provides features such as Close app, Toggle GPS, Airplane mode (JB 4.2+), Toggle NFC Setting, Stay On while charging (JB 4.2+), Location Access, Improved Timestamp activity, and Call. Additionally, this plugin moved the Call activity and CALL_PHONE permission, as well as the Timestamp activity and WRITE_CALENDAR permission, from the main app to the plugin. The plugin also supports the German language.

Overall, NFC ReTag Expert Plugin is a helpful tool for expert users who use NFC Retag and need advanced features.