Compare software

HammerWonderPen
Free

Free and open source under the MIT licence.

 Paid

Proprietary software sold through a purchase page on the developer's site.

Windows, Linux, Android Windows, macOS, Linux
  • Native apps rather than a web page in a wrapper
  • Runs on phones and desktops
  • Unlimited-depth tree for chapters and documents
  • Export to PDF, Word, EPUB and web pages, including whole books
  • Issue reporting is steered towards Discord
  • Feature details are sparse in the available documentation
  • Proprietary and paid
  • Cloud sync relies on the developer's own service
Downloadable app Downloadable app
Open source Closed source
License: MIT License: Proprietary
Not stated if an account is needed Not stated if an account is needed
Not stated if it works offline Works offline

Checked October 2, 2026

Checked October 1, 2026

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