WhatsApp has launched a desktop app today - so you don't need to worry about keeping in touch during the workday if you forget your phone!
The desktop app is synced with the phone app so all your conversations and messages are available on your computer.
How does it work?
How do I get WhatsApp desktop?
Then, open the app and scan the QR code using the WhatsApp app on your phone (look for WhatsApp Web menu under settings).