Linwood Butterfly

Linwood Butterfly is built with Flutter and provides an unbounded vector canvas that writes note files directly to local storage rather than proprietary cloud servers. The app delivers digital handwriting, stylus sketching, and document markup without requiring user accounts or subscriptions. Notes remain entirely offline on personal devices or sync across hardware using self-hosted WebDAV storage.

Why Linwood Butterfly instead of Microsoft OneNote

Microsoft OneNote ties note-taking to a Microsoft account and synchronizes notebooks through OneDrive by default. For anyone taking personal notes, sketching private ideas, or keeping a journal, this model routes thoughts through corporate infrastructure and telemetry. Linwood Butterfly follows a local-first model: every sketch and note is stored directly on your machine as an open file. There is no login requirement, no online handshake, and no cloud dependency. If you want cross-device sync, you connect your own WebDAV server or transfer files manually, keeping your data under your exclusive control.

Platform availability and workflow focus present another major difference. OneNote lacks a native desktop client for Linux, leaving desktop users reliant on a browser interface that handles stylus input awkwardly. Linwood Butterfly provides native desktop and mobile apps across Linux, Windows, Android, and web browsers. The trade-off centers on organizational depth. OneNote excels at multi-tiered notebooks, section tabs, and automated handwriting search through optical character recognition. Butterfly strips away that corporate structure in favor of a freeform visual whiteboard, exchanging automated text recognition for complete spatial freedom and personal privacy.

What it does well

• Infinite drawing canvas expands in every direction, providing limitless space for mind maps, lecture sketches, and freehand brainstorming without page boundaries.
• Stylus and touch input support pressure sensitivity, multiple pen types, highlighters, and custom color palettes for fluid sketching on tablets.
• Document annotation lets you import PDF pages, SVG graphics, and images directly onto the canvas to mark up slides or trace diagrams.
• Flexible storage allows saving notebooks locally on your drive or syncing across devices through standard WebDAV folders.
• Visual navigation tools including waypoints and labeled areas help organize large canvases and jump between topics.