The main purpose of WhatsApp is to allow users to communicate with each other via instant messaging, voice calls, and video calls. It is a free messaging app that can be used on smartphones and other mobile devices, as well as on desktop computers.

FM Whatsapp APK was originally created as a way for people to send text messages and multimedia content to each other without incurring the high fees associated with traditional SMS messaging. However, it has since evolved to include a wide range of features, such as group chats, voice and video calls, and the ability to share documents and other files.

Today, WhatsApp is used by millions of people around the world as a convenient and reliable way to stay in touch with friends, family, and colleagues. It is especially popular in countries where mobile data plans are expensive or limited, as it allows users to communicate with each other without using up large amounts of data.