How it works
Apps check for downloaded content first; AI features that need a live model almost always require a connection.
What can and cannot work offline
Text lessons, pre-recorded audio, and flashcard review can all be fully offline, since they are static content bundled or downloaded ahead of time. AI conversation features, live tutoring, and streaming video content generally cannot, because they depend on a server-side model or another person in real time.
Best apps for offline study
Babbel and Duolingo both support downloading lessons in advance on mobile, covering the bulk of their standard course content without a connection — though Duolingo's AI features (Max) need to be online. Rosetta Stone also supports full offline lesson downloads, which suits its picture-matching format well since there is no live component to begin with.
Best for offline audio
Pimsleur's audio lessons are designed to be downloaded and used entirely hands-free, making them one of the most naturally offline-friendly formats — ideal for flights, commutes, or areas with unreliable data.
Best for offline vocabulary review
Anki runs entirely on-device once a deck is synced, with no functionality lost offline at all — it is the most complete offline experience in this category, since spaced repetition scheduling is pure local computation.
Planning an offline study trip
Download lessons, audio, and any decks over Wi-Fi before you travel — do not rely on doing it at the gate. If your routine depends on AI conversation practice or live tutoring, plan around connectivity gaps by front-loading spaced repetition review and audio lessons for the offline stretches instead.
Frequently asked questions
Which app works best with no internet at all?
Anki, since its entire function — spaced repetition flashcards — runs locally once a deck is downloaded.
Can I use Duolingo Max offline?
Standard lessons can be downloaded, but the AI video call and explanation features require a connection.
Is Pimsleur good for a long flight?
Yes — its audio lessons are designed to be downloaded in advance and used entirely hands-free.
