Underfiction
VerifiedInteractive fiction where you direct the scene and the model writes the prose
Visit WebsiteThe Bottom Line
Best for
Readers and hobbyist writers who want to direct a long-form story scene by scene instead of reading a finished one.
Entry price
Free plan available, paid tiers above
Biggest con
Anyone wanting a manuscript editor or a novel drafted for them.
TL;DR - Underfiction
- 500 welcome credits, up to 4000 credits for invited users.
Top Pros
- Character portraits and short video clips generated inside the story
- Voice narration with selectable voices
- Sync across web, iOS and Android, encrypted at rest
Top Cons
- Anyone wanting a manuscript editor or a novel drafted for them.
What Users Say About Underfiction
Underfiction is an interactive storytelling app for web, iOS, and Android. You set a world, characters, and an opening, then direct each scene; the model writes it as prose rather than chat replies. You choose the text model per story from a catalog of open and frontier models, and can generate character portraits and short video clips. Stories sync across devices, are encrypted at rest, and export to a portable archive file. Credit-based, with no subscription.
Highlights
- Character portraits and short video clips generated inside the story
- Voice narration with selectable voices
- Sync across web, iOS and Android, encrypted at rest
Limitations
- Anyone wanting a manuscript editor or a novel drafted for them.
Best for: Readers and hobbyist writers who want to direct a long-form story scene by scene instead of reading a finished one.
Editorial synthesis from industry coverage, product docs, and early user reports
Editorial policyWhat is Underfiction?
Available on: Web, iOS, Android
Pros & Cons
Cons
- Anyone wanting a manuscript editor or a novel drafted for them.
Preview
Key Features
Pricing Plans
Free TrialPricing checked Aug 28, 2026
Free
500 credits on signup
Credits
$0.01 / credit
Pay only for what you generate
Is Underfiction worth the price?
The pricing is fair and generous for casual users, with 500 free credits and a low $0.01 per credit pay-as-you-go model.
However, heavy users will find it expensive compared to flat-rate subscriptions for similar interactive fiction tools, as costs scale linearly with usage. Best for light or experimental users who want to avoid monthly commitments.
Hidden Costs & Gotchas
No bulk discount for high-volume credit purchases
Credits expire if account is inactive for long
No rollover of unused free credits
No refunds on unused purchased credits
Premium features may require additional credit spend
How Underfiction Compares to Competitors
Underfiction's per-credit model is cheaper than most proprietary interactive fiction APIs for light use, but pricier than subscription-based competitors like Choice of Games or Twine for heavy users. It offers more flexibility than flat-rate tools, but lacks the unlimited usage of premium tiers from larger platforms.
Reviews
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