Since this is an integrated feature, you only need to ensure your is updated to the latest version via the Google Play Store or the Apple App Store. Follow these steps to enable it on your device: How to Lock your WhatsApp with Biometrics
To "download sidik jari WA" (download WhatsApp fingerprint), you don't actually need to download a separate application. The or fingerprint lock is a built-in privacy feature of WhatsApp that allows you to secure your chats using your phone's biometric sensor. How to Activate WhatsApp Fingerprint Lock download sidik jari wa