Apostrophe vs Celtx

Apostrophe is a free Linux desktop Markdown editor built around focused writing. Its interface includes a distraction-free mode, with dark, light, and sepia themes. A live preview updates while a document is written, and built-in tools include spellchecking and document statistics. The app exports to PDF, Word or LibreOffice, LaTeX, and HTML slideshows; ODT is also listed as an export format. The TexLive plugin enables PDF export and formula display in the inline preview. Apostrophe is available for Linux, and the maker directs users to Flathub for the latest version. Users can report issues or suggest ideas through the project issue tracker. The listed Free plan costs nothing and describes a Markdown editor for Linux desktop. The Apps for GNOME page lists version 3.5, released on 2026-10-08, and names Manuel Genovés as maintainer.

Celtx is cloud-based software for writing, planning and managing media-production projects, including film, television, commercials, documentaries and interactive media. Script editors cover film and television screenplays, stageplays, multi-column audiovisual scripts and game scripts. Story development includes Beat Sheet, Storyboard and Script Goals & Insights; production planning tools cover breakdowns, catalogs, shot lists, scheduling, cast and crew, sides, budgets, call sheets and reports. Users can collaborate in real time with comments, presence awareness, permissions and shareable read-only links. Script revisions, feedback and approvals have a history. The cloud product runs in a browser, while Celtx Screenplay is listed for Windows computers and Android devices; mobile browsers include iPhone Safari support. The free plan allows one project, and the Writer plan supports up to three. Paid Writer billing is $11.24 a month when billed yearly, and a seven-day trial is listed. The maker is based in St. John's, Newfoundland and Labrador, Canada, and was founded in 2000.