xnotes

xnotes is a handwriting-first notebook for phones and tablets, built for pen and stylus. Write, sketch and annotate with pressure-sensitive, variable-width ink, and nothing you draw is ever flattened.

Highlights:

* Pressure-sensitive ink: a custom stroke engine turns raw stylus samples into a smooth, variable-width ribbon that swells and tapers with pen pressure, so handwriting and sketches feel natural instead of like a flat marker.
* Vector PDF, in and out: drop in a PDF as a page background to annotate, then export your notes back to PDF as true vector — ink and text stay crisp at any zoom instead of being flattened to pixels.
* Razor-sharp deep zoom: a background renderer redraws a high-resolution viewport off the main thread, so you can zoom far in and the ink stays sharp rather than turning blocky.
* Real highlighter blending: highlighters are composited live every frame with a true multiply blend, so overlapping strokes deepen like real ink instead of painting over one another.
* Neon pen: a glowing pen with a bright white core and saturated, luminous edges for accents that pop off the page.
* Smart PDF dark mode: invert a PDF page for comfortable night reading while leaving embedded photos and images untouched.
* Nothing is ever flattened: every stroke is stored as editable vector data in the open .xnote format, so you can re-select, move, restyle or erase any mark at any time.
* Stylus-aware by design: pen and finger are handled separately, so you can pan with a finger while you draw with the pen; on devices without a stylus, finger drawing turns on automatically.
* Private and open: open source, no accounts, no telemetry, no network access at all. Files go through Android's Storage Access Framework, so the app needs no broad storage permission either.

Also includes:

* Shapes, text boxes and image insertion
* Stroke and object erasers, plus box and lasso selection with move and resize
* Multi-page documents with several page sizes
* A backstage file area: recent notes, a built-in folder explorer and quick sharing
* A side panel with page thumbnails, contents and bookmarks
* Undo and redo
* Pinch to zoom and a configurable pen side-button action
* Customisable theme, accent colour and page defaults