App: Lock PDF Pro - Lock and unlock
Developer: Giacomo Guglielmi
Genres: Productivity, Entertainment

Password protect or unlock your PDFs with this app!
Easy to use, you can unlock PDFs by freeing them from the password, or add another one so that they can only be viewed by those you decide.
All you have to do is drag the files you want to unlock or protect into the app and the app will do all the work for you.

Release notes:
Performance improvements and bug fix