A free program for Android, by NETIGEN Utilities.
The Notepad with PIN code is a simple and handy tool for creating notes, shopping lists, or just about anything else you can think of, then setting a password. It offers you a clean and simple user interface, making it perfect for beginners.
When you're done, you can save the note and edit it or delete it. If you want to add more notes, just add them to the list. You can also check or uncheck each line on the list to make sure that it is saved correctly.
