WhatsApp Messenger is a platform available on smartphones which come with end-to-end encryption used for instant messaging. It is a free to download app available for all smartphones. It uses the internet to send messages, images, calls(audio or video). This service is very similar to text messaging service; however, Whatsapp uses the internet for sending messages thus costs low to the user than other messaging services. Whatsapp is currently the biggest and most famous online messenger app available easily in the market.
In order to enjoy WhatsApp services you need: a compatible Smartphone or tablet with a sim card, an internet connection, and a phone number. The app uses your phone number as its username, and your account is locked to the phone, it allows you to transfer your contacts over to new devices. To use the app it costs €0.99 per year, with the first year services are being free. This cost is used as an In-App purchase. In January 2015 WhatsApp also introduced Google Chrome plug-in which allows a user to access their WhatsApp chats on their desktops conveniently.
It comes with various features, users can easily share their exact locations in real time over messaging, users can also customize their list of contacts so that they can quickly send messages at once to lots of people or even start a group chat, it is probably the best feature through which one can be easily in touch with others instantly, it uses the Internet to make voice calls, one to one video calls; send text messages, images, GIF, videos, documents, audio files, phone contacts and voice notes to other users using standard cellular mobile numbers. It also has an interesting feature which is called Status, whereby users can upload photos and videos to a 24-hours-lifetime feed that, by default, are visible to all contacts; similar to Snapchat, Facebook and Instagram Stories.