If you want to make sure that no one can use WhatsApp on your iPhone without your permission, you can lock it and add Apple's Face ID and a passcode to the app

This lets you lock Whatsapp on your iPhone every time you use it. This makes sure that your information is only accessible to people you give permission to use your phone

It's easy to set up the lock feature on WhatsApp on your phone, which adds another layer of security to your app

Set up Face ID with WhatsApp: FaceID is the greatest technique to lock WhatsApp on your iPhone because it automatically unlocks when you open it. This works like iPhone Face ID

To turn this feature on, open the WhatsApp app on your iPhone and go to Settings > Account > Privacy > Screen Lock > Require Face ID and turn the switch on

When you open the WhatsApp app on your iPhone, it will use Face ID to unlock your phone. If Face ID doesn't work, you'll be asked to enter your iPhone's passcode

How to disable Face ID on WhatsApp If you want to turn this feature off in WhatsApp, you can either use the method above or go to the Settings menu on your iPhone and turn it off there

To disable WhatsApp Face ID, go to Settings > Face ID & Passcode and enter your passcode. Once this is done, pick Other Apps and then WhatsApp from the list; turn off the toggle and you may access WhatsApp without Face ID or a passcode.

There you have it; an additional safeguard for your iPhone's WhatsApp. It protects your iPhone's privacy while also ensuring that your WhatsApp conversations remain private.