You can download and install the Joyn app on smartphones with iOS and Android.
Depending on your settings, the app will automatically or manually update when a new version is available. Click here to find out how to change the settings for updates on iPhone and here how to adjust them on Android. (Link to ‘How do I install the new Joyn app update on my iPhone?’ and ‘How do I install the new Joyn app update on my Android smartphone?’ )