ChapterAI Free
Free
Get started for free. No payment required.
- Up to 3 stories & 5 branches
- 3 default system prompts
- Up to 50 messages per story
- Chapters & Glossary
Coming Soon
Create your own story with AI as your writing companion
ChapterAI is a focused writing tool that uses AI to help you build stories based on your instructions. Manage your content with chapters and alternate branches to keep your narrative organized and explore different story paths.
Everything you need
Divide your story into chapters
Use chapters to organize your story into manageable sections. This will help manage the AI context window and keep your narrative structured. Only summaries of previous chapters will be used for the AI context, so you can generate new content without worrying about hitting token limits.
Screenshot coming soon
Use glossary terms to maintain consistency
On chapter creation the AI will automatically extract important characters, locations, and concepts to add to your glossary. You can also add custom terms. The AI will refer to these terms when generating content to help maintain consistency across your story.
Screenshot coming soon
Branching narratives
Create multiple story paths and explore different outcomes. You can safely experiment with new ideas without losing your original story. What if the hero took the left path instead of the right? What if they made a different decision? Branching allows you to explore all possibilities.
Screenshot coming soon
Brainstorm with AI
The app has a separate brainstorming mode where you can ask the AI questions, get suggestions, and generate content without affecting your story. It's a safe space to explore ideas, get unstuck, and refine your narrative before committing changes to your chapters.
Screenshot coming soon
Simple pricing
One payment. Yours forever.
ChapterAI
$14.99 / one-time
+ VAT added at checkout where applicable.
Buy once, own it forever. Free updates included.
- Unlimited stories & branches
- Custom system prompts
- Google Drive sync
- Export to PDF, EPUB, Markdown
- Free updates
- Personal use license
Payments are processed securely by (TBA) . 30-day money-back guarantee.
Frequently asked questions
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Windows, Linux and Android. iOS and macOS versions are on the roadmap.
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No. ChapterAI is a one-time purchase. You just pay for your own API usage. You get free updates for the lifetime of the major version.
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ChapterAI uses a large language models to generate content based on your instructions and the context of your story. The AI is called through an API, so you can use your own API key to connect to the AI provider of your choice.
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A free trial with limited features (up to 3 stories & 5 branches) is available. No account required.
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If ChapterAI isn't right for you, contact me within 30 days for a full refund — no questions asked.