The app puts everything behind one menu. Once you know where that is, the rest is quick.
The menu
Tap the menu button in the top left of any screen.
From top to bottom you get:
Home, your starting point.
Agent, your own AI study companion. This only appears if your school has turned it on.
Classrooms, every class you are in.
Tutors, the tutors your teachers have set up for your classes.
Recent chats, the last few conversations you had, with All chats underneath to see the rest.
Your organisation at the very bottom. Tap it to open your settings.
Home
Home has a card to start a new chat with your agent, and a Recently assigned list of the work waiting for you. Each card shows how far through you are and how long you have left. Tap View all to jump to your classrooms.
Classrooms
Your classes, each with the teacher's name underneath. Tap one to find its assignments, tutors and resources.
What is on the website but not in the app
A few things still need a browser. The app will open one for you where it can.
Joining a class. Use your join code or link in a browser.
Creating your account. Also a browser job.
Your notifications inbox. Notifications live on the website.
Editing your profile details. Tapping Edit account in settings opens your browser.
Voice Mode. Talking to your agent out loud is a website feature. On your phone you can dictate instead, which is covered in Chatting to your agent on your phone.