A free app for Android, by IdeaSolutions S.r.l..
What is KYMS?
KYMS is an app that lets you hide, encrypt and protect your files. It can hide files from the built-in Gallery app, and you can also import them from other apps and websites. By using the built-in AES encryption, it can protect files from hackers and other unauthorized users. You can also add an additional layer of security by using a 4-digit PIN.
It works on most Android devices, including tablets. It has a user-friendly interface, and it can hide and encrypt a lot of files.