Inkwell vs Lastslate

Inkwell is a screenplay editor for iOS and macOS, with keyboard-first controls, screenplay formatting, outlining, notes and a chat-based writing partner called Quill. Screenwriters can work with a beat board and outline navigator, add inline notes and synopses, track revisions, and generate character sides. Quill can brainstorm and propose edits as diffs, but applies changes only after the writer approves them. The editor supports offline writing, formatting, file management, import and export; it handles Final Draft FDX and Fountain files as well as PDF import and export. The free plan includes the full editor, unlimited scripts, offline use and no account requirement. Quill requires an internet connection. Credit packs cost $4.99 as a one-time purchase for 150 credits; Quill Pro costs $10 a month or $100 a year, with 500 credits each month. Sync is off by default and can be enabled for individual scripts. When Quill is used, script excerpts may be sent to third-party language-model providers, while conversation summaries are stored on the maker's servers.

Lastslate is a screenplay editor for macOS and Windows with an AI collaborator that reads scripts but does not write dialogue. As a writer types, the editor identifies elements such as sluglines, character cues and dialogue, and saves automatically. It supports Final Draft FDX, Fountain, plain text and PDF, and can turn PDF screenplays into editable scenes. The Beat Board links story beats to script scenes and is included on every plan; Pro adds reference images to beats. Built-in tools derive cast lists, location and prop breakdowns, loglines and one-sheets from a script. Browser review links let recipients comment on script lines without an account, while Pro allows up to 10 writers to co-write one script live. Scripts are stored locally by default, and optional cloud backup is encrypted in transit and at rest. AI actions send the relevant excerpt, prompt and session context to the AI provider for that request. The free plan includes the full editor, Beat Board, PDF and FDX export, 10 cloud projects and limited AI collaboration. Pro costs $15 a month; Pro+ costs $45 a month.