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Basic reading, annotation and export work without signing up. Sign in for live rooms, billing and paid credits.

Select a passage and choose an action such as Explain or Summary. When you have your own question, continue the conversation with Nova.

Once the app and document have loaded, local PDF reading and annotation work offline. Explanations, translation and other cloud AI features need an internet connection.

Open a PDF and choose Summary in Study Mode. Work with the document or a page range, then use the source references to check the original passage.

Yes. Ask Nova a question or request an explanation of a selection. Screenshot-to-AI also lets you ask about figures and equations.

Choose Quiz or Flashcards in Study Mode. Use a chapter, page range or your highlights to create revision material and revisit the source while practising.

Select a region with Lens Translator, or translate a page range in Study Mode. For printed scans, use OCR to extract readable text first.

Nova is Protiva’s AI tutor for explaining, translating and summarizing passages. Use Read aloud for a page, or listen to a chapter walkthrough with Nova audio lessons.

See connections between people, topics and concepts in your document. Use the graph to understand relationships, then return to the original text to verify them.

AI can be wrong or incomplete. Verify important information against your PDF; source references help you return to the original passage.

As many as you’d like! Protiva supports unlimited real-time collaboration on any PDF. Read together, highlight passages and discuss notes in the same session.

Create a session in Rooms and share its six-character code or QR. Cursors, highlights and notes sync live. The room ends when the host closes it.

Yes. A share link uploads a copy of your PDF and annotations for read-only viewing. Revoke it from the same Share dialog to remove that shared copy.

Signed-out reading stores your library locally in your browser. Signed-in account and sync features can use cloud storage. Clearing local browser data can delete the local library, so export a backup first.

The text needed for your chosen feature goes through the AI gateway to a model provider; vision features also send the required page image. The whole PDF is not sent by default. See the Privacy Policy.

Printed Bangla and English OCR runs in your browser. Extract text from a photo or camera image; it works offline after the OCR engine loads. Sending an image to AI is a separate action.

An .lpdf bundle keeps the PDF and its annotations together. Export it as a backup and import it into Protiva to restore your work. Choose a flattened PDF for viewing in ordinary PDF readers.

Read the feature guides in Documentation. For a download or account issue, visit Contact or email protiva.ragib@gmail.com.

No, your credits never expire—they will last forever. You can keep unused credits and use them later.

Protiva dynamically selects the best AI model for each specific task via OpenRouter to ensure optimal results. You do not need to choose a model for every request.