日常通訊 - Whatsapp

現時最普及的通訊軟件，可於多平台上使用，主要限制是必須要有手提電話號碼。

WhatsApp for Android
https://play.google.com/store/apps/details?id=com.whatsapp&hl=zh-TW

WhatsApp for iOS
https://itunes.apple.com/us/app/whatsapp-messenger/id310633997?mt=8

WhatsApp for Windows (64-bits)
https://web.whatsapp.com/desktop/windows/release/x64/WhatsAppSetup.exe

WhatsApp 網頁版
https://web.whatsapp.com/

Official Website
https://www.whatsapp.com/