# LinaPad

> Return to the recording through the notes you wrote

A local-first notebook that combines PDF annotation, freeform pages and lecture recording, linking handwritten strokes to the exact moment in the audio.

- Developer: CommonSource
- Category: Productivity
- Platforms: iOS, Android
- Version: 1.0.9
- Minimum iOS: 15.0
- Official product page: https://commonsourcelab.com/en/apps/lina-pad

## Key experiences

### Write with the ease of paper, then edit with digital precision.

Tune color and width across four pen tools, then lasso the exact strokes to move, rotate or copy. Ink remains crisp and editable, separate from the source PDF.

- Writing controls for four pens, color and stroke width
- Lasso editing that moves, rotates and copies selected ink

### Bring each written moment back together with its explanation.

Record a lecture without leaving the page, then select a stroke to resume its connected moment. Export pages and audio for sharing or keep everything together in an editable backup.

- The notebook menu for PDF, PNG and M4A export plus LinaPad backup
- Lecture recording in progress while handwriting continues on the page

### Match the paper and interface to the way you study.

Choose blank, ruled, grid or dot paper with a preferred color, then set appearance and language. Start from an empty notebook and keep the same writing and recording workflow.

- Notebook background controls for ruling and paper color
- App settings for appearance and interface language

## Essential features

- **Audio linked to handwriting**: Handwritten strokes keep their place on the recording timeline. Select one later to jump directly to the explanation that shaped it.
- **PDFs and editable vector ink**: Keep source PDFs intact while writing with four pen tools, transforming vector ink with a lasso and building notebooks from multiple paper styles.
- **Exports and editable backup**: Export annotated pages as PDF or PNG and audio as M4A, or preserve source PDFs, vector ink and recordings together in an editable .linapad backup.

## Made for

- Students annotating lecture PDFs by hand
- Learners who want a quick path back to a recorded explanation
- Professionals keeping meeting notes and audio in the same context

## Privacy and notes

PDFs, handwriting and recordings stay on-device without an account or real-time cloud sync, and leave only through an export you choose.

## Frequently asked questions

### How are notes linked to a recording?

Each stroke written during recording keeps its timestamp. Selecting it during review jumps to the connected point in the audio.

### Can I keep the original PDF with my notes?

Yes. Source PDFs and vector ink remain separate, while a .linapad backup can preserve the PDF, handwriting, recordings and notebook metadata together.

### Does it require an account or internet connection?

No. Core writing, recording, review and export features work locally without an account.

## Download

- [App Store](https://apps.apple.com/us/app/linapad-pdf-notes-recording/id6800003453)
- [Google Play](https://play.google.com/store/apps/details?id=com.commonsourcelab.linapad)