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Drawboard PDFRnote
Freemium

Free to download, with paid plans for additional features and teams.

 Free

Free and open source, with optional sponsorship of the developer.

Windows, macOS, Android, iOS, Web macOS, Linux
  • Markup tools designed for pen and touch input
  • Annotations sync live across all devices
  • Pressure-sensitive stylus input with configurable strokes
  • Imports and annotates PDFs and images
  • Team review features are aimed at architecture and engineering
  • Advanced features sit behind paid plans
  • Native file format is unstable between versions
  • macOS builds come from a separate project
Downloadable app, Web application Downloadable app
Closed source Open source
License not stated License not stated
Not stated if an account is needed No account needed
Not stated if it works offline Not stated if it works offline

Checked September 23, 2026

Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.