Jotdown

An academic PDF reader and note-taking app for Android.

Read PDFs, annotate, write academic notes, and export in ABNT format — 100% offline, no account, no tracking.

Features

- PDF reader with lazy multi-page rendering via PdfRenderer - Annotation layer — Pen, pencil, highlighter, and eraser with stylus pressure support - Thickness selector — Three preset sizes per tool - Post-it notes — Notes anchored to PDF coordinates, stored in Room - Highlights and excerpts — Capture passages with optional OCR - ABNT export — Academic metadata with .MD, .TXT, and .PDF output - Folders and labels — Library organisation with drag-and-drop - Backup and restore — Export the entire library as a .zip - No network — No internet permission, no account, no telemetry

Note

FOSS variant without proprietary dependencies.

License

GNU General Public License v3.0 or later