Secret AppLock

Most popular applock in Play Store. Protect privacy with password, pattern, fingerprint lock.
Features:
Lock settings - Prevent your children from buying unwanted apps/games and phone settings.
Lock apps - Protect Apps such as SMS, Contacts, Email, Gallery, Market, Calls and any app you choose, with abundant options, protecting your privacy.
Protect your apps all the time. No one can snoop on your apps without your permission.
Lock privacy - Lock for gallery (Gallery Vault), photos, and files, AppLock can hide pictures and videos, empower you to control photo and video access.

★ Take a photo of who tried to unlock your WhatsApp immediately
★ Email the snooper's photo to you immediately
★ The photo will record the date and the time

App Lock provides you the different password types.
★ Set your Fingerprint as the password
★ Use Pattern (draw gesture)
★ Use PIN code (numbers)

---- Customized Lock Mode (Lock timing) ----
AppLock provides the temporary unlock. You don't need to unlock apps every time.
★ Lock your app at the device screen off
★ Lock your app after you minimize it immediately
★ Lock your app after the device screen has been off for 3 mins