First, download the free GoToMeeting app on the App Store, Google Play or Windows store. The app works for GoToMeeting, GoToWebinar and GoToTraining. You can also download the GoToWebinar app.
Once installed, it’s much like joining from a computer. Simply click the link in your invitation email (your mobile phone should prompt you to open the link through the app) or open the app and enter the session ID.
Clicking on the link in your invitation email from your mobile device will also initiate the app download process.