Libraries, flights, commutes, and weak campus signals should not decide whether you can review one more page. Download what you need before you leave the network, and make the offline plan part of your normal setup instead of an emergency fallback.
Keep the useful parts local
Core reading, notes, and downloaded language models can stay available on mobile. When you reconnect, changes sync back into the same course space. That means a commute can still be a useful review session rather than a dead zone in your week.
Translation in the flow
On-device translation lets you understand a difficult passage without leaving the document or waiting for a new network request. It is especially useful for technical terms, bilingual courses, and moments when you need a quick explanation rather than a full translation of the entire file.
Reconnect without losing the thread
When you are online again, let the course space become the source of truth. Keep the notes you made offline, check the materials you marked, and choose the next small task while the context is still fresh.