How to set up fingerprint lock on WhatsApp for Android 
In order to enable the fingerprint sensor lock on WhatsApp for Android, you need to follow these steps.
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Update WhatsApp and open it
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Go to Settings via the three vertical dots on top-right.
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Tap on Account.
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Move to Privacy.
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Choose âFingerprint Lockâ option.
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Toggle on or off âUnlock with Fingerprintâ option.
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When you tap âUnlock with Fingerprintâ, you will be asked to provide the fingerprint.
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After this, choose the time limit â âImmediatelyâ, âAfter 1 minuteâ, and âAfter 30 minutesâ
How to set up Face ID/ Touch ID fingerprint lock on WhatsApp for iPhone
WhatsApp for iOS allows users to set the unlock method as either âRequire Face IDâ or âRequire Touch ID,â depending on the model. However, the setup process remains the same for both face and fingerprint unlock. All you need to do is:
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Update WhatsApp and open it
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Go to Settings.
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Tap on Account.
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Move to Privacy.
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Tap on the âScreen Lockâ option.
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Toggle on or off the âRequire Face IDâ or âRequire Touch IDâ button.
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Now, you will see options for the time limit for biometric lock. Choose between âImmediatelyâ, âAfter 1 minuteâ, âAfter 15 minutesâ, and âAfter 1 hourâ.
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Once you choose a time limit, WhatsApp will ask you to provide the fingerprint ID/ face scan to unlock WhatsApp.
The fingerprint lock option on WhatsApp is a secure and convenient way to ensure that nobody reads your messages even if you hand them the phone unlocked.

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