WhatsApp expands to the desktop

WhatsApp is taking its popular messaging service to the desktop with a new Mac and Windows app released Tuesday. 
It's a pretty straightforward app: the millions of WhatsApp users can now continue conversations from their phone on a computer, and vice versa. That's a boon for people who want to chat with friends on WhatsApp without having to use their phones. 
The move should help WhatsApp better compete with other messaging services like Line, WeChat and Telegram, which already have