FV Calculator Locker is a free and very secure photo and video vault, which can be used to lock all kinds of files on your device, like photos, videos, audio recordings, documents, etc. Files can be locked with a password or with a fingerprint. If someone tries to access a file, they will not be able to do so unless they have the correct password or fingerprint. 

FV Calculator Locker also has a built-in multimedia player, which allows you to play all kinds of videos and audio recordings. It supports a variety of formats. You can play your favorite video files on the FV Calculator Locker app, as well as protect them with a password. 

FV Calculator Locker can be used to lock files on your phone, which is a very convenient way to protect them. FV Calculator Locker is a very secure photo and video vault, which can be used to lock all kinds of files on your device. You can also transfer files from the Gallery, the built-in camera, and the Internet browser.