# Casty vs Read Boost

The clearest difference is ads: Casty at none against Read Boost's shown. Casty also leads on update cadence (every 2 days vs every 5 months) and monetization model (free vs ad-supported). Read Boost's advantage is ratings volume (3 vs 1). On price, rating, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for Casty against 5.0 for Read Boost. Both are backed by a comparable volume of ratings — 1 and 3 respectively.

Casty ships an update every 2 days, Read Boost every 5 months. The most recent releases landed on September 1, 2026 and June 6, 2026 respectively.

## The numbers

| Metric | Casty | Read Boost |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/casty/id6740439860/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/read-boost/id6740498520/reviews) |
| Number of ratings | 1 | **3** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 2 days** | Every 5 months |
| Monetization | **Free** | Ad-supported |
| Size | 23 MB | 13 MB |
| Requires iOS | **15.1** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Wai Yip Li](https://appshunter.io/developer/1789980681) | [Jonathan Goldman](https://appshunter.io/developer/1774235948) |

## 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 Boost

[App page](https://appshunter.io/ios/app/read-boost/id6740498520)

This app uses AI to help you read faster and understand more. It offers adjustable reading speeds and tracks your progress to improve focus and comprehension. Ideal for students and professionals seeking a more efficient way to consume information.

**Highlights:** AI-powered text summarization, Adjustable reading speeds, Progress tracking, Optimized focus, Enhanced comprehension

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Casty free?

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

### Is Read Boost free?

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

### Which has better reviews, Casty or Read Boost?

Casty and Read Boost are both rated 5.0 out of 5 on the App Store, from 1 and 3 ratings respectively.

### Do Casty or Read Boost have ads?

Read Boost shows ads; Casty does not.

### Which is updated more often, Casty or Read Boost?

Casty ships an update every 2 days, and Read Boost every 5 months. Most recently, Casty was updated on September 1, 2026 and Read Boost on June 6, 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.*