Apps for Android:-
File Locker:-
File Locker comes with its own file browser. You can batch select and encrypt/decrypt files irrespective of size. It also allows you to open documents from within the app and notifies you if a file is left unlocked by mistake. The interface can be configured to either display all files, only locked files or only unlocked files.
Pocket:-
Pocket allows you to save login information for websites, bank accounts and so on under various categories. The application requires a master password to view the data stored inside and allows you to copy text while keeping ti masked. This way no one can read your login credentials even if the app is left running.