Apps like Secure Folder : Secure Vault

Here are some great alternatives to Secure Folder : Secure Vault by Fairy Duster :
Lock Apps - App Lock, Password
Lock Apps - App Lock, Password
★4.1
Vault - Hide Pics, App Lock
Vault - Hide Pics, App Lock
★4.3
App lock - Fingerprint,Applock
App lock - Fingerprint,Applock
★4.6
Smart Vault - Hide Photo Video
Smart Vault - Hide Photo Video
★4.0
 Hide Photo Vault  &Videos 
 Hide Photo Vault  &Videos 
★4.5
Secret Calculator: Photo Vault
Secret Calculator: Photo Vault
★3.5
Hidden Safe: Photo Vault App
Hidden Safe: Photo Vault App
★4.0
Folder Lock Pro
Folder Lock Pro
★4.2
Secure Folder – Secure files
Secure Folder – Secure files
★3.7
Private Zone-Applock, Vault
Private Zone-Applock, Vault
★4.1
App Lock - Applock Fingerprint
App Lock - Applock Fingerprint
★4.7
Gallery Lock Photo Video Vault
Gallery Lock Photo Video Vault
★4.3
Photo Vault - Secret Locker
Photo Vault - Secret Locker
★4.6
Calculator Lock: Gallery Vault
Calculator Lock: Gallery Vault
★4.4
Calculator Vault - Hide Photos
Calculator Vault - Hide Photos
★4.8
Calculator Lock: Media Vault
Calculator Lock: Media Vault
★3.8