AppLock Lite
Protect privacy with password, pattern, fingerprint lock
Screenshots
Hunter's comment
AppLock can lock your WhatsApp, incoming calls, Instagram, Facebook, Gmail, Snapchat, SMS and any app. Pictures and videos can be hidden and less memory is used. You can also keep your personal document.
Link
https://play.google.com/store/apps/details?id=com.domobile.applock.lite&hl=en
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