Story World Builder is a story-planning tool designed by webtoon and web novel professionals — for when an idea strikes, when you're shaping a character, when the plot gets stuck.
Key Features
1. Chat with Your Characters
Talk directly to the characters you've created.
They answer as themselves, drawing on the personality, speech, relationships, and world you wrote.
The fastest way to hear what they'd actually say.
Conversations carry over, and you can start fresh anytime.
2. Build a Scenario — on a proven story structure
Pick a few keywords and a story structure, and AI proposes three scenarios in different directions.
Ki-Sho-Ten-Ketsu, Three-Act, Five-Act, the Story Circle, the Hero's Journey, or Save the Cat's 15 beats —
instead of a blank page, work through a structure that has carried stories for a long time.
Pick one and it expands into an Episode 1 plot draft, with its cast added to your Characters in one tap. The ones you didn't pick stay in your history.
3. Worldbuilding
Record your world systematically — background, rules, magic systems, and places.
Write what doesn't exist in your world in the "Taboos / Limits" field, and the AI won't cross that line in any suggestion.
The AI assistant helps you expand settings and check for contradictions.
4. Character Management
Design characters in detail — personality, MBTI, appearance, abilities — and see how everyone connects with the relationship map.
5. Plot Builder
Structure your story with episodes, scenes, and cuts. AI suggests next scenes, twists, cut ideas, and feedback.
6. Write a Full Episode Manuscript (AI Pass Standard)
Turn an episode you've filled out into prose you can publish, following what you wrote — world, characters, relationships, and your "Taboos / Limits".
It picks up the flow of earlier episodes and the voice of your last manuscript, so names and tone stay steady.
Not quite right? Ask for a revision — change only the part you picked, or rewrite the whole thing.
Copy it, or send it straight to a messaging app.
7. Storyline
Visually build timelines where multiple characters' stories intersect, and compare their actions period by period.
8. AI Writing Assistant
- Naming Studio: pick what you're naming — character, place, faction, magic, item, or monster — add a mood, and get 15 names that fit your world, each with a note on how it reads.
- Dialogue and scene ideas whenever you're stuck.
- Mood presets: romance, fantasy, mystery, slice of life, dark, or comedy.
Conversations are saved per project.
9. Export Your Story as a PDF
Pick the sections you want — worldbuilding, characters, plot, storyline — and turn them into one PDF.
The relationship map is included as an image, and the PDF opens anywhere — messaging apps, email, AirDrop — without the app.
Good to Know
- Creative features (worldbuilding, characters, plot, storyline), saving, and PDF export are always free.
- The AI Assistant is free for 10 uses a month.
- For character chat, manuscript writing, or more AI Assistant uses, you can subscribe to AI Pass.
- Manuscript writing is on AI Pass Standard, up to 5 manuscripts a month.
Subscription Details
- AI Pass Light: $1.99 per month / $19.99 per year
- AI Pass Standard: $3.99 per month / $39.99 per year
- Your first subscription starts at an introductory price and renews at the standard price above once that period ends.
- Payment is charged to your Apple Account at confirmation of purchase.
- Your subscription renews automatically for the same period unless cancelled at least 24 hours before the end of the current period. Renewal is charged within 24 hours before the period ends.
- Manage your subscription or turn off auto-renewal in Settings > Apple Account > Subscriptions.
- Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
- Privacy Policy: https://pentagonal-clover-eec.notion.site/38381493fd0e80d69fb6ea34fd6a83ef
It's time to bring your story into the world. Start with Story World Builder!
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