This article explains how to lock WhatsApp on mobile devices. This information applies to both Android and iOS. However, the fingerprint lock feature only works on devices running Android 6.0 and later.
Introducing Chat Lock on WhatsApp
If WhatsApp is your go-to vehicle for secure messaging and calling, you’ll be glad to know there’s now even more to love. To keep WhatsApp secure and keep prying eyes out, use the WhatsApp Lock feature to add a fingerprint lock or Face ID lock.
iPhone offers many ways to protect your privacy, and one of them is WhatsApp privacy lock with Face ID. To enable that feature, follow these steps.
Scroll down and tap Screen Lock.
