The Official WhatsApp category includes all official versions of WhatsApp, including WhatsApp Business, WhatsApp for Android, WhatsApp for iPhone, WhatsApp for Mac, WhatsApp for iPad, WhatsApp for PC, and WhatsApp Web.
You will be able to communicate with your friends after you download any of the official versions. You can share all kinds of media, whether photos or videos, as well as files.
The only thing you need in order to join WhatsApp is an internet connection and a phone number. After that, you can communicate for free with any of your contacts.
In WhatsApp, you can also create groups of up to 256 members. However, in group calls only, you can make voice or video calls with up to three people.