In my country, the most popular apps are WhatsApp and Facebook. With WhatsApp, it’s easy to save someone’s contact. It allows family members who live far from home to communicate anytime, and it’s very affordable. As for Facebook, many people use it to buy and sell various things.

In my country, popular apps include whatsapp and facebook. With whatsapp, it is easy to stay in/keep in/maintain contact with somebody. It allows/enables members of the family who live far from you to communicate with you at all times and it is very/extremely cheap. With facebook, many people use this app to buy or/and sell many things.