While it may not have really taken off in the U.S., WhatsApp is easily one of the most popular ways to communicate across the world. It has more than two billion users worldwide and is the leading ...

You can add contacts on Skype by searching for a name, phone number, or email address. This search function is found in the "Contacts" section of the Skype app. The ...

Apple’s Contacts apps are terrible. On both iOS and Mac, they’re opaque, confusing and frustrating to use. Cardhop is a brand-new contacts app for iPhone and iPad that is better than the built-in app ...

You can add contacts to WhatsApp by manually entering them in Chats, or scanning the QR code from their WhatsApp profile. You can also import contacts from your phone to WhatsApp. When entering ...