Maybe you were already aware of WhatsApp Web - the version you could use from within your internet browser.
Although it seems to work well so far, it is far from perfect. Normally, the popular messaging app WhatsApp is only used on mobile devices (Android, iOS, Windows Phone and Blackberry), however with the brand-new PC and Mac version of the app, you can finally use it from your desktop! All you need to do is simply install the WhatsApp program so you can chat with your friends straight from your Mac or Windows PC.
Softonic-recensie WhatsApp for PC - not quite there yet