No functionality offline, when you actually have time to learn.
I’ve paid over a thousand pounds on various courses and there is STILL no offline mode. Want to access the content you paid for on a train or plane? You can’t! You can press a download button to prepare for your travel that takes up storage space on your device but the videos still buffer from the nonexistent internet, and nothing in the app loads unless you have a WiFi/mobile connection. Customer ‘support’ try to blame you and tell you to download everything again. Nothing changes. They know it’s broken and they’re not interested in fixing it. I feel sorry for the creators whose work is held hostage here.