5. WhatsApp
WhatsApp is one app that is personally my favorite. It has the smoothest interface and works brilliantly in almost every phone. It is perfect to keep in touch with your friends and family. You just need to have the other person’s number and you are good to go. Send text messages, pictures, videos, songs and even make phone calls over the Wi-Fi and your phone bill won’t ever increase. The best part is, WhatsApp uses the most minimum amount of data so even if you are short on data package or have low Wi-Fi, you can still use it.