> For AI agents: the complete documentation index is available at https://docs.flashnerd.com/llms.txt, the full documentation bundle is available at https://docs.flashnerd.com/llms-full.txt.

# Local data and offline use

Your decks, cards, media, and review history are stored in a local profile for the signed-in account. Different accounts on the same installation use separate profiles.

## Prepare to study offline

1. While online, sign in successfully or open the app so its saved session can be verified.
2. Check that the cards and media you want are present on this device.
3. If you use the Free plan, check that you have review credits available.
4. Export a [collection backup](https://docs.flashnerd.com/guide/import-export/backups.md) before travel or device changes.

The app can reopen offline when it has an existing local profile and a still-valid saved session from an earlier online verification. Offline access is not indefinite: an expired session, missing profile, or unverified installation requires a connection and successful sign-in.

## What needs a connection?

| Action                                                                    | Connection requirement                                                                             |
| ------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------- |
| Study cards already on this device                                        | Can work locally after a valid session has opened the profile; Free reviews need available credits |
| Edit local cards or save already received AI drafts                       | Can work locally                                                                                   |
| Sign in to a new account or establish an initial profile                  | Requires a connection                                                                              |
| Generate new cards with AI                                                | Requires a connection and AI allowance                                                             |
| Link/unlink sign-in methods or delete the account                         | Requires communication with the account service                                                    |
| Load/claim server rewards, watch verified rewarded ads, reconcile credits | Requires a connection                                                                              |

Text-to-speech availability also depends on the device's speech engine and installed voices. Check the required voices before relying on them offline.

## Account changes and local storage

Logging out retains the account's local profile on that installation. Sign back in with the same linked account to reopen it. Another account will not see that collection automatically.

Deleting the account is different: it permanently removes the account and its study data. Uninstalling the app or clearing app data can also remove local study files. Save a backup outside the app before taking those actions if you intend to retain your cards.

See [sign-out and deletion](https://docs.flashnerd.com/guide/accounts/sign-out-and-delete.md), [credits and missions](https://docs.flashnerd.com/guide/accounts/credits-and-missions.md), and [backup restoration](https://docs.flashnerd.com/guide/import-export/backups.md).