Open in Whatsup lets you start a whatsapp chat with any number without needing to add to your phone contacts list. Just with one step you can open and start chat with any unsaved phone number who use whatsapp messenger or whatsapp business. Bored of the process of saving a number and searching for the name to start chat with someone? Save your time, and open any number directly in whatsapp without adding it to your contacts list! Features: - Enter a phone number and open whatsapp chat directl