Experience the simple way to have better conversations. joyn works with your smartphone’s address book, so it’s really easy to chat, group chat and add live video to your calls. You can also share files including video, images and documents whilst messaging or during a call.joyn automatically detects when you and your friends have the application on your phone and it’s ‘always on’. For those who don’t, you are able to invite your friends to download the joyn app for free.Using your existing data allowance plan or through WiFi, joyn really is the simplest way to chat and share.It´s compatible with Android 2.2 and more recent Android handsets. We recommend having a SD memory card for the app to download and work properly. For low specification smartphones, real time video may be delivered slowly and/or in a pixelated format.