InkwellInkwell vs Arc Studio Pro
Arc Studio Pro is a browser-first screenwriting tool with outlining and collaboration. Inkwell is a native Mac editor with a built-in AI assistant that suggests and never writes for you.
| Feature | Inkwell | Arc Studio Pro |
|---|---|---|
| Price | The full editor is free. Pro ($10/month or $100/year) only adds more Quill credits. | Free tier (limited); Pro at $99/year. |
| Built-in AI assistant | ✓Quill, with an approve/reject diff for every suggestion. | ~AI-powered outlining and beat generation tools. |
| Platforms | Native macOS app. | Browser-based with desktop companion (Mac and Windows). |
| Outlining / beat boards | ~Scene-level outlining in the project sidebar. | ✓Beat boards, story map, and plot-point structure tools (a standout feature). |
| File formats | ✓Fountain and Final Draft (.fdx) import and export. | ✓Final Draft (.fdx), PDF, and Fountain export on Pro. |
| Offline writing | ✓Fully offline; internet only needed to ask Quill. | ~Desktop companion has offline support; browser requires a connection. |
| Real-time collaboration | —Single-writer focused today. | ✓Real-time collaboration on Pro. |
Arc Studio Pro offers a free tier (limited projects) and a Pro plan at $99/year (or ~$9.99/month), which unlocks unlimited projects, real-time collaboration, revision tracking, and additional export options. It runs in the browser with a desktop companion app on Mac and Windows. Facts current as of August 2026; check arcstudiopro.com for the latest.
Choose Arc Studio Pro if
- You rely on visual outlining tools like beat boards and story maps.
- You co-write in real time with collaborators.
- You want a browser-based tool that works on any platform.
- You want a free tier for getting started without installing anything.
Choose Inkwell if
- You want a built-in AI assistant that suggests but never auto-writes.
- You write solo and want a fast, native, offline-first Mac editor.
- You want the full editor for free, not just a limited free tier.
- You move scripts between Fountain and Final Draft (.fdx).
Arc Studio Pro is a modern screenwriting tool built around outlining, beat boards, and real-time collaboration. It runs in the browser with a desktop companion app and offers a free tier alongside its Pro subscription. Its outlining tools — beat sheets, plot boards, and a story map — are some of the strongest in the category.
Inkwell is a native macOS screenplay editor with Quill, a built-in AI assistant. Quill brainstorms, suggests dialogue, and restructures scenes, and every suggestion arrives as a diff you approve or reject. The editor itself is free, and Inkwell reads and writes both Fountain and Final Draft (.fdx).
If you want browser-based collaboration with strong visual outlining, Arc Studio Pro is worth a look. If you want a fast native Mac editor with an AI assistant you control and no subscription required for writing, try Inkwell.
Bring a script over and see.
The full editor, unlimited scripts, and Fountain and Final Draft import are free. Move a script over from Arc Studio Pro and see how Quill works.