Teacher: I need to access my account on my phone or tablet. Do I use the app?
Edited
No, the app is only designed to show student accounts. To see your teacher account on your mobile device, open the site in any browser. It’s optimized for small screens, too.
You can also add an icon to your homescreen for one-click access to your Vivid teacher account: read this, watch this, or use the iOS Shortcuts app to learn how to set that up