Barcode Manager for Education stores a history of reading and creating QR Codes in the app.
To view history, click
“History” button at the bottom of the app.
You can view the history of the QR Codes read from the Reader screen, and the history of the QR Codes you create from the Create screen.
In the history list, you can narrow down the display by keywords.
To refine, click the 
“Search” button in the upper right corner of the app.
Enter the keyword you want to search for and click the
(Search) button next to the keyword you want to search for, and only the history containing the keyword will be displayed.
To remove the filtered view, click the X (clear) button in the keyword input field.