# Casto: AI Character Fiction — My First Casting Universe

> AI fiction app for creating characters and generating episodic novels. (iPhone/iPad app by Giyeop Hwang.)

- Source: https://appshunter.io/ios/app/casto-ai-character-fiction/id6762036374 (this page in markdown: same URL + `.md`)
- Developer: [Giyeop Hwang](https://appshunter.io/developer/1767157534)
- Category: Books, Entertainment
- Price: Free with in-app purchases
- Age rating: 12+
- Requires: iOS 15.1 · 115 MB
- Languages: American English, French (France), German (Germany), Japanese, Korean, Chinese (Traditional, Taiwan)
- Released: 2026-05-06
- Data updated: 2026-08-01
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/casto-ai-character-fiction/id6762036374/reviews.md

## What is Casto?

AI Fiction with Your Own Cast!

Casto is where your imagination becomes fiction. Create the characters who live in your head — every detail, every quirk — then cast them into AI-written novels that unfold one episode at a time.

Casto is an AI fiction app — half story generator, half interactive fiction — that lets you cast original characters into branching, multi-episode novels.


— WHAT YOU CAN DO —

• Cast your own characters.
Design original characters with names, photos, MBTI, occupations, and backstories. Reuse them across an entire universe of stories.

• Generate multi-episode novels.
Sketch a plot in a line. Casto writes a full episodic novel starring your cast — in romance, fantasy, comedy, or thriller.

• Shape the story's direction.
Every chapter ends on a branching choice. Pick the path, and the next episode unfolds from there.

• Build a universe, not just a story.
Every character you make joins your personal casting universe. Cast them into new stories, watch storylines intersect, and grow a world only you could imagine.


— HOW IT WORKS —

1. Create your characters — name, photo, MBTI, occupation, backstory.
2. Cast them as leads in a new story (romance, fantasy, comedy, or thriller).
3. Steer each chapter with a branching choice. Casto writes the next episode around your call.
4. Reuse your cast in future stories. Your universe grows.


— WHAT MAKES CASTO DIFFERENT —

Most AI writing apps forget your characters the moment a story ends. Casto doesn't. Every character lives in your personal casting universe and can return as a lead, a love interest, or a foil across as many novels as you want to write. Less prompt-tweaking, more reading the fiction only your characters could star in.


— WHO IT'S FOR —

For readers who've always wanted to write the fiction they love. For writers who never tire of casting new leads. For anyone who has ever closed a book wondering, "what if my own character had been the lead?"

Casto turns "what if" into "next episode."


Terms of Use: https://spectacled-curler-cda.notion.site/Casto-Terms-of-Service-3557d7acbcce80a29425e28336318611
Privacy Policy: https://spectacled-curler-cda.notion.site/Casto-Privacy-Policy-34d7d7acbcce80c89eb7f12478c1e1d2

## Key features

- Character creation with photos and backstories
- AI-generated multi-episode novels
- Branching narrative choices
- Build a persistent character universe
- Reuse characters across stories

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Casto Pro Monthly | $9.99 | per month |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| 500 Popcorn | $4.99 | one-time |
| 1000 Popcorn | $9.99 | one-time |
| 2000 Popcorn | $17.99 | one-time |
| 5000 Popcorn | $39.99 | one-time |
| 10000 Popcorn | $69.99 | one-time |
| 1000 Popcorn | $4.99 | one-time |
| 1 Extra Slot | $4.99 | one-time |
| 5 Extra Slots | $19.99 | one-time |
| 10 Extra Slots | $29.99 | one-time |


## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/casto-ai-character-fiction/id6762036374/reviews.md

### 5/5 — 잘 쓰고있습니다

*2026-05-10*

퀄리티가 좋네요. 다른 AI 생성형 앱보다 훨씬 글이 잘 작성되네요. 제가 좋아하는 인물들로 스토리를 쓰는 재미가있습니다

**Developer response:** 05kimw님 안녕하세요. 저는 Casto를 만든 개발자입니다.

재미 있게 즐겨주시는 것 같아 개발자로써 무척 뿌듯함을 느끼고 있습니다.
Casto는 단순한 캐릭터 챗에서 벗어나, 좋아하는 캐릭터를 만들고 캐스팅하며 유니버스를 확장시키는 재미를 느낄 수 있도록, 여러 고민 끝에 만들어진 앱입니다. 저 역시 애정을 담아 지속적인 업데이트로 앱을 개선해 나가고 있습니다.

이용 중 불편사항이나, 제안사항이 있다면 언제든지 의견을 남겨주세요! 소중한 이용자분들의 피드백을 무엇보다 가치 있게 여기고 있습니다.

다시 한 번 리뷰를 남겨 주셔서 고맙습니다. 개발자 드림. ☺️

## Frequently asked questions about Casto

### What is Casto?

Casto is an AI fiction app that allows you to create original characters and cast them into AI-written novels. It functions as both a story generator and an interactive fiction platform, where you can influence the narrative's direction.

### How do I create characters in Casto?

You can design original characters by providing details such as their name, photo, MBTI type, occupation, and backstory. These characters can then be reused across multiple stories within your personal casting universe.

### Can I influence the story's plot in Casto?

Yes, every chapter in the AI-generated novels ends with a branching choice. By selecting a path, you steer the direction of the story, and the next episode will unfold based on your decision.

### Does Casto have ads?

Yes, Casto contains advertisements. As a free application with in-app purchases, advertisements are displayed to support its continued development and availability.

### What kind of stories can Casto generate?

Casto can generate novels in various genres, including romance, fantasy, comedy, and thriller. You can sketch a basic plot, and the AI will write a full episodic novel starring your cast.

### What devices does Casto support?

Casto is currently supported on iPhone and iPod devices. This ensures that users on Apple's mobile ecosystem can access the app.

### How often is Casto updated?

The latest version of Casto is 1.7.2, and it was last updated on June 15, 2026. This indicates a relatively active development cycle for the application.

### What is the age rating for Casto?

Casto has an age rating of 12+. This suggests that the content is generally suitable for users aged 12 and above, considering themes and complexity.

## Version history (last 5 releases)

### 1.7.2 — 2026-06-15

We have further improved the app's usability and stability.

### 1.7.1 — 2026-06-14

We have further improved the app's usability and stability.
- Significantly increased the character limit for character profiles, giving you more room to add rich details.

### 1.7.0 — 2026-06-05

We have further improved the app's usability.
- Added haptic feedback to make interactions feel more responsive and natural.
- You can easily toggle this feature off in the Settings menu if you prefer.

### 1.6.13 — 2026-06-02

We have further improved the app's usability and stability.

### 1.6.12 — 2026-06-01

We have further improved the app's usability and stability.

## More apps by Giyeop Hwang

- [99 Moments](https://appshunter.io/ios/app/99-moments/id6745161686)
- [Embargo: News-Style AI Diary](https://appshunter.io/ios/app/embargo-news-style-ai-diary/id6755754129)

All apps by Giyeop Hwang: https://appshunter.io/developer/1767157534

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-01.*