WriterDuet is a screenwriting software for writing and editing screenplays and other forms of mass media.

[3] In May 2018, WriterDuet included Bechdel test analysis functions to address issues of gender diversity in the screenwriting industry.

[4] In 2018, WriterDuet published WriterSolo, an offline version of their app that runs on the browser and opens/saves files on the computer, Dropbox, Google Drive, and iCloud.

[5] WriterDuet is primarily used to outline, write, and format screenplays to the standards recommended by the AMPAS.

The software is powered by Firebase allowing users to write together in real-time from multiple devices.