# AI Audiobook Reader - Castly — Character Voices Chirp Libby

> Character Voices Chirp Libby (iPhone/iPad app by SlothEase.)

- Source: https://appshunter.io/ios/app/ai-audiobook-reader-castly/id6768542554 (this page in markdown: same URL + `.md`)
- Developer: [SlothEase](https://appshunter.io/developer/1816632091)
- Category: Utilities
- Price: Free with in-app purchases
- Age rating: 12+
- Requires: iOS 18.0 · 26 MB
- Languages: American English, French (France), Japanese, Korean, Chinese (Simplified, China), European Spanish, Chinese (Traditional, Taiwan)
- Released: 2026-07-02
- Data updated: 2026-10-16

## What is AI Audiobook Reader?

Finally — your fanfic, web novels, and uploaded books read like a real audiobook.
Castly assigns a unique AI voice to every character, automatically. No more
robotic single-voice TTS. No more waiting for an audiobook that never gets made.

WHY READERS CHOOSE CASTLY

FULL CAST, AUTOMATICALLY
Castly reads your novel and identifies every speaking character. Each one gets
their own AI voice — distinct tone, gender, age, accent. Dialogue feels alive
the way it does in a real audiobook production.

BRING ANY BOOK
Upload EPUB, TXT, PDF, or paste a chapter URL. Drop in an AO3 work link or a
Royal Road chapter. Castly handles the rest — chapter splitting, character
detection, voice casting.

100+ AI VOICES
Pick the cast yourself or let Castly choose. Warm narrators, snarky teens,
gravelly villains, breathy heroines — every voice sounds natural, not robotic.

BUILT FOR LONG-FORM LISTENING
- Smart resume — picks up exactly where you stopped, even on lock screen
- Sleep timer with fade-out
- Background playback plus AirPods and CarPlay support
- Adjustable speed: 0.5x to 3x
- Per-character voice memory across chapters
- Library, bookshelf, and reading history sync across devices

PERFECT FOR
- Fanfic readers who want their AO3 backlog as podfic
- Web novel readers following Royal Road, ScribbleHub, Wattpad
- Indie authors who want to hear their own book
- Anyone with a stack of EPUBs Audible doesn't carry
- Commuters, dog-walkers, dish-doers — anyone who reads with their ears

CASTLY PRO
Unlimited uploads, premium voice cast, offline downloads, and early access to
new voice models. Try Pro free for 7 days.

WHAT MAKES CASTLY DIFFERENT

Most TTS apps give you one robotic voice for the whole book. Castly gives you
a cast. It's the difference between a school librarian reading aloud and a
fully-produced audiobook. Stories with two speakers feel like a conversation.
Stories with twenty feel like a movie.

We built Castly because we were tired of waiting. Half the stories worth
listening to will never get a professional audiobook — fanfic, indie novels,
serialized web fiction, translated work. Castly is for everyone who already
has the story and just wants to hear it.

Privacy: Your uploads stay yours. Castly processes text on-device wherever
possible and never sells your library data.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Castly Pro Monthly | $9.99 | per month |
| Castly Pro Annual | $49.99 | per year |


## Is AI Audiobook Reader safe?

Not enough ratings yet to assess AI Audiobook Reader.

## Is AI Audiobook Reader legit?

AI Audiobook Reader - Castly appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for AI Audiobook Reader is 65 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 5 releases)

### 1.6 — 2026-10-15

Improved subscription analytics.

### 1.5 — 2026-10-12

Updated App Store names and subtitles across supported languages to make Castly's AI audiobook and character voice features clearer.

### 1.4 — 2026-09-30

Book covers now appear earlier during import and update automatically on your bookshelf. Chapter confirmation and listening remain available while covers are prepared. Improved translations, including Traditional Chinese. Fixed reading-position alignment when switching chapters. Upcoming audio is prepared more smoothly across chapter boundaries.

Import books in fewer steps and start listening as soon as chapters are confirmed.
Keep listening while character voices are prepared, with smooth updates after the current audio segment finishes.
Fix playback interruptions around dialogue and quotation marks.
Enjoy a gentler waiting sound while the next audio segment loads.
Listen to more natural narration with expressive character voices and emotional delivery.
Read with preserved paragraph breaks, dialogue spacing, and spoken-text highlighting.

### 1.2 — 2026-09-02

New in this version:
- Contact Castly Support directly from Settings with diagnostic logs attached automatically.
- Richer startup diagnostics help us resolve account and subscription issues faster.

### 1.1 — 2026-09-01

New in this version:
- Review and adjust detected chapter boundaries before character analysis.
- Export diagnostic logs from Settings for easier playback troubleshooting.
- Improved TTS playback and audio-session diagnostics.
- Automatically replace unavailable voices so existing books keep playing.

## Apps similar to AI Audiobook Reader

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [BookNPC - AI TTS eBook Reader](https://appshunter.io/ios/app/booknpc-ai-tts-ebook-reader/id6743934058) | 3.5 (2) | Free | Utilities |
| [GrepTag: Search & Tag Books](https://appshunter.io/ios/app/greptag-search-and-tag-books/id6779977609) | — | Free | Utilities |
| [Spatial Audio Preview](https://appshunter.io/ios/app/spatial-audio-preview/id6761795541) | — | Free | Utilities |
| [Foxycape AI Reader](https://appshunter.io/ios/app/foxycape-ai-reader/id6501987109) | 5.0 (1) | Free | Utilities |
| [Castly TV Control & Casting](https://appshunter.io/ios/app/castly-tv-control-and-casting/id6755174657) | — | Free | Utilities |
| [注册计量师真题库 - 2025年计量师考试题库](https://appshunter.io/ios/app/2025/id6738836183) | — | Free | Utilities |

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All apps by SlothEase: https://appshunter.io/developer/1816632091

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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 2026-10-16.*