WHATSAPP users have just realised there is a hidden security feature to make your messages even more private.
A TikTok user has revealed how you can make sure your WhatsApp conversations will remain for your eyes only.
All you have to do is lock your app with your fingerprint.
He explained: "If you need more privacy on your WhatsApp, change your simple setting.
"So if you go into WhatsApp, tap on the three dots in the top right corner, tap where it says 'settings', go where it says 'privacy.'
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"You'll see it says 'fingerprint locked' and then 'unlock with fingerprint'.
"Switch that on and then you're good to go."
The company previously said: "As an additional security measure, you can enable Touch ID or Face ID on WhatsApp.
"You can still reply to messages from notifications and answer calls if WhatsApp is locked."
Enable Touch ID or Face ID on WhatsApp
On iPhone, you have two options: Touch ID or Face ID.
Which one you use depends on the iPhone model you have – but it means either unlocking via a scan of your fingerprint or face.
To activate it, go to WhatsApp, open Settings, then tap Account.
Next go to Privacy and then Screen Lock.
After that, you'll want to turn on either Require Touch ID or Require Face ID.
You'll also be given the option to choose how long WhatsApp can be on standby mode for – before requiring Touch ID or Face ID.
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Remember: you can disable this at any time by going back into your WhatsApp Settings.
If the unlock doesn't work, you can still gain access via your iPhone passcode.
Enable Android fingerprint lock on WhatsApp
First, go into WhatsApp and then tap More Options – or the three dots.
Next go to Settings, then Account, then Privacy.
You'll want to scroll all the way to the bottom and tap Fingerprint Lock.
Then turn on Unlock With Fingerprint.
You'll be asked to touch the fingerprint sensor to confirm the fingerprint you'll be using.
Just as with iPhone, you can choose an amount of time that can pass before you need to authenticate your fingerprint on WhatsApp again.
You'll also get an option to show content in notifications, if you want to preview any message text inside alerts.
If you don't see any of these options, it's possible that you're using an outdated version of Android.
You'll need to have an Android device with a fingerprint sensor running Android 6.0.
And remember: you can still answer WhatsApp calls even if the app is locked.