You cannot download it from the PlayStation Store. Neither Meta (Facebook/WhatsApp’s parent company) nor Sony Interactive Entertainment ever developed a native client for the system. Here is why:
: Dedicated players often organize PS Vita WhatsApp groups on external platforms like Reddit to discuss game releases and technical support. whatsapp for ps vita
: The Vita's built-in browser is outdated and generally cannot load modern web-based messaging services like WhatsApp Web due to unsupported security protocols. You cannot download it from the PlayStation Store
