Does AlgoApp work offline?

Yes

AlgoApp works offline for day-to-day studying, as long as the deck is already on your device.

What works offline

• reviewing downloaded decks
• creating decks
• editing cards
• adding tags and making other local changes

What requires internet

• creating or signing in to an account
• downloading decks
• sharing decks
• syncing across devices

Anything you do offline will sync later when your connection returns.