Questions before you open a PDF.

Core reading, vocabulary storage, the built-in dictionary, OCR and downloaded on-device translation can work without an internet connection. Optional features may require network access.

Yes. Scanned PDFs can be processed with on-device OCR so their text can be used in the reader and vocabulary workflow.

When enabled, Folio evaluates the words on the current page and highlights words it considers challenging according to the configured highlight density.

Yes. The app can download an English-to-Hindi ML Kit model for on-device translation. The selected target language and model status are managed in Settings.

AI explanations are optional. The app can request Gemini explanations using an API key configured by the user. Core reading and vocabulary workflows do not depend on AI.

Yes. The vocabulary area provides export options, including Anki-compatible CSV and readable plain text.

The current Android project uses local storage for reading state and vocabulary and does not require a central user account for those workflows.