Do not download .ipa files from unverified sources. The security risks outweigh the non-existent benefits, as the app is functionally dead from a connectivity standpoint.
Have more questions about legacy WhatsApp versions? Leave a comment below, or check Apple’s official guidelines on app compatibility. whatsapp 2.3.6 old version download ios
If you absolutely need to run a lighter, older version of WhatsApp on iOS, here are the closest legal alternatives — though none will get you exactly to version 2.3.6. Do not download