xnotes is a handwriting notebook for Android, built for the stylus. Take notes, sketch and annotate PDFs with ink that feels like a pen on paper.

Ink that feels like a pen: pressure-sensitive and low latency, with pens and highlighters.
Neon glow: make any pen glow.
Disappearing ink: ink that fades away on its own, great for teaching and presenting.
Shape snapping: draw a rough shape, hold, and it snaps clean.
Sharp at any zoom: ink and PDFs stay crisp however far you zoom in.
Notebooks and an infinite canvas: pages when you want structure, endless space when you don't.
Book layouts: single, double or cover pages, scrolling or page flips.
PDF import: bring in any PDF and write all over it.
Room for side notes: widen a PDF's margins on any edge and take notes on the side.
PDF text markups: highlight, underline and strike out text, add comments, search it.
PDF colour filters: invert, sepia, contrast, brightness, multiply and screen.
Images stay untouched: filter a PDF and its photos and images keep their true colours.
Dark and OLED modes: easy on the eyes at night, true black on OLED screens.
Real PDF export: sharp vector output with selectable text, links and bookmarks.
Markdown: write in markdown and it formats as you type.
Typed notes: tables, LaTeX equations and code highlighting, right on the page.
20+ page templates: Cornell, planners, music staves, isometric and more.
Endless themes: any accent colour, eight styles for each, dual tone and Material You.
Make it yours: rearrange the toolbar, float it or dock it on any edge, and pick its size.
Split view: two notes side by side.
A real file explorer: grid, gallery, list, column and timeline views, with plenty to customise.
Your notes, your folders: notes are saved as files in a folder you choose, not locked away in an app's database, so you stay in full control of them.
Works with stylus pens: S Pen and many others.
Always editable: nothing gets flattened, so every stroke can be moved, restyled or erased later.
Private: open source, no account, no ads, no tracking, no permissions.