To install the Webex Meetings app without logging into the official account, follow these steps: 1. Visit the official Webex website or your device's app store. 2. Search for the Webex Meetings app. 3. Click on the 'Download' or 'Install' button. 4. Once the app is downloaded, open it. 5. You can join meetings as a guest without logging in by entering the meeting number or link provided by the host. Note: Some features may be limited without an account.