Android is a mobile operating system developed by Google, based on a modified version of the Linux kernel and other open source software and designed primarily for touchscreen mobile devices such as smartphones and tablets. In addition, Google has further developed Android TV for televisions, Android Auto for cars, and Wear OS for wrist watches, each with a specialized user interface. Variants of Android are also used on game consoles, digital cameras, PCs and other electronics. Android has been the best-selling OS worldwide on smartphones since 2011 and on tablets since 2013. As of May 2017, it has over two billion monthly active users, the largest installed base of any operating system, and as of June 2018, the Google Play store features over 3.3 million apps.
iOS (formerly iPhone OS) is a mobile operating system created and developed by Apple Inc. exclusively for its hardware. It is the operating system that presently powers many of the company’s mobile devices, including the iPhone, iPad, and iPod Touch. It is the second most popular mobile operating system globally after Android. The iOS user interface is based upon direct manipulation, using multi-touch gestures. Interface control elements consist of sliders, switches, and buttons. Interaction with the OS includes gestures such as swipe, tap, pinch, and reverse pinch, all of which have specific definitions within the context of the iOS operating system and its multi-touch interface. Apple has been significantly praised for incorporating thorough accessibility functions into iOS, enabling users with vision and hearing disabilities to properly use its products.
More than 1 billion people in over 180 countries use WhatsApp to stay in touch with friends and family, anytime and anywhere. WhatsApp is free and offers simple, secure, reliable messaging and calling, available on phones all over the world. WhatsApp started as an alternative to SMS. The product now supports sending and receiving a variety of media: text, photos, videos, documents, and location, as well as voice calls. The messages and calls are secured with end-to-end encryption, meaning that no third party including WhatsApp can read or listen to them. Behind every product decision is a desire to let people communicate anywhere in the world without barriers. WhatsApp was officially made available for PCs through a web client, under the name “WhatsApp Web”, in late January 2015 through an announcement made by Koum on his Facebook page: “Our web client is simply an extension of your phone: the web browser mirrors conversations and messages from your mobile device—this means all of your messages still live on your phone”.
The WhatsApp user’s handset must still be connected to the Internet for the browser application to function. All major desktop browsers are supported except for Microsoft Internet Explorer. WhatsApp Web’s user interface is based on the default Android one.
WhatsApp users can now add up to four people in total to a group voice or video call. The feature is finally rolling out to all WhatsApp users.
The company announced,”Over the last couple years, people have enjoyed making voice and video calls on WhatsApp. In fact, our users spend over two billion minutes on calls per day. We’re excited to announce that group calls for voice and video are coming to WhatsApp starting today,” Users can make a group voice or video call with upto four people in total. To make a group call, you need to first start a voice or video call with one person — just like you do generally before making a regular conference call on mobile. To add people to call, just tap the new “add participant” button in the top right corner.
They also said that Group calls are always end-to-end encrypted, and we’ve designed calling to work reliably around the world in different network conditions. You can make a group call with up to four people total — anytime and anywhere. Just start a one-on-one voice or video call and tap the new “add participant” button in the top right corner to add more contacts to the call.
In order to start a group call, start a video or voice call with one of the contacts. Following this, you will see a button at the top-right corner of the screen that will let you add another participant to the call. Once the call gets connected, an Add Person icon is shown on the top right, above the names of the recipient. Next, if the third user accepts the call, both the names will be shown with a comma separating them. You will be able to add up to three participants for a total of four people in a video or voice call. Do note that you need to download the latest version of the WhatsApp app via Google Play Store and Apple App Store.
WhatsApp video and audio calls can have up to four participants including the person who started the call. This means a user can add up to three contacts on a group audio and video call. The ‘add participant’ icon that WhatsApp has added for group video and audio calls will be disabled after a user adds a third participant.
To check whether you have got the group video calling feature or not, just make a normal video call to any of your WhatsApp contact. If you see a new ‘Add participant’ button on the screen, it means you have got the group video calling feature and can add a total of up to four people to video calling. But if you don’t see this button, then it means you will have to wait till WhatsApp rolls out this feature to you.
WhatsApp has started rolling out the feature globally for both Android and iOS, so, you can expect to receive the feature in the next few days if haven’t already. Earlier this month, WhatsApp rolled out a feature called ‘Suspicious Link Detection’ which enables users to detect harmful links sent and received on WhatsApp. The aim of the feature is to make the platform more secure. During Facebook’s Q2 2018 earning call last week, company CEO Mark Zuckerberg announced that WhatsApp now has more than 1.5 billion monthly active users on WhatsApp.