WhatsApp Aero mod app is a modified version of the official WhatsApp messenger that provides extra features and customization options not available in the standard app. It allows users to apply custom themes, enhance privacy settings, share larger files, and control app appearance and behavior more freely. Since it is a mod, it is not available on the Google Play Store and must be downloaded as an APK from trusted third-party sources. While it offers added functionality and personalization, using WhatsApp Aero may carry security risks and can violate WhatsApp’s terms of service, so users should install it cautiously.