Open the downloaded file and follow the prompts. If you see a "Parse Error," the version is likely too new for your OS. Current Limitations and Risks
Downloading WhatsApp via APKPure for Android 4.4.4 (KitKat) was a common workaround in 2021, but it has since become a legacy process due to shifting system requirements. whatsapp apkpure android 444 2021
Visit the WhatsApp Messenger Old Versions page on APKPure and select a version from 2021 (like 2.21.x). Open the downloaded file and follow the prompts
Navigate to Settings > Security and toggle on Unknown Sources to allow installations from outside the Play Store. whatsapp apkpure android 444 2021
This is widely cited as one of the last versions to support Android 4.x before the official cutoff. Installation Guide for Older Devices