# Casty vs Read with Booki

The clearest difference is in-app purchases: Casty at none against Read with Booki's 2. Read with Booki's advantage is update cadence (daily vs every 2 days) and iOS requirement (13.0 vs 15.1). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. Read with Booki sells 2 in-app purchases, starting at $0.99 per month. Casty asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Casty against 5.0 for Read with Booki. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Casty ships an update every 2 days, Read with Booki daily. The most recent releases landed on October 18, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Casty | Read with Booki |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/casty/id6740439860/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/read-with-booki/id6772623567/reviews) |
| Number of ratings | 1 | 1 |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 days | **Daily** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 23 MB | 124 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Wai Yip Li](https://appshunter.io/developer/1789980681) | [Florithm LLC](https://appshunter.io/developer/1192090855) |

## What reviewers say

### Casty

[App page](https://appshunter.io/ios/app/casty/id6740439860)

Transform PDF documents into engaging podcasts with live transcripts and a built-in dictionary. Listen offline to educational content in Japanese or English after generation.

**Highlights:** Convert PDFs to podcasts, Live transcripts, Built-in dictionary, Offline listening, Japanese and English support

**Features:** macOS Compatibility

**In-app purchases:** none


### Read with Booki

[App page](https://appshunter.io/ios/app/read-with-booki/id6772623567)

This interactive reading app transforms classic literature into a personalized English learning experience. An AI companion helps you understand vocabulary in context, generates custom quizzes, and provides pronunciation guidance. Explore a curated library of timeless stories while improving your language skills.

**Highlights:** Tap-to-learn vocabulary in context, AI-generated vocabulary quizzes, Interactive AI reading companion, Native audio pronunciation, Curated library of classic literature

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Booki Premium | $0.99 | per month |
| Booki Premium | $9.99 | per year |


## Frequently asked questions

### Is Casty free?

Casty is free to download, with no in-app purchases.

### Is Read with Booki free?

Read with Booki is free to download, with in-app purchases available.

### Which has better reviews, Casty or Read with Booki?

Casty and Read with Booki are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do Casty or Read with Booki have ads?

Neither Casty nor Read with Booki shows ads.

### Which is updated more often, Casty or Read with Booki?

Casty ships an update every 2 days, and Read with Booki daily. Most recently, Casty was updated on October 18, 2026 and Read with Booki on October 31, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*