1. Go to www.Manymo.com and create an account there.
2. Sign up for a Free account on Manymo.com and verify your account by clicking on the registration link in your email account
3. Download whatsapp.apk from official website-www.whatsapp.com
4. Click on "Launch Emulators" and select Launch by App.
5. On the page that follows, click on the Upload button
6. Now browse the whatsapp.apk you have downloaded in step (3).
7. Now choose you resolution and a OS
8. Hit the launch button for the emulation to start.