Comparison

Casty vs Read with Booki

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Casty

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
Read full description

Convert PDF files into educational podcasts in Japanese or English Live transcript with built-in dictionary. Offline listening available after generation.

About

Read with Booki

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
Read full description

Read with Booki: Your AI Reading Companion Unlock the joy of reading and mastering English with Read with Booki, an interactive reading app that turns classic literature into a personalized language-learning journey. Whether you are expanding your vocabulary or simply getting lost in a good story, your AI companion, Booki, is by your side to guide you every step of the way. Key Features: Tap-to-Learn In Context Encounter a word you don't know? Simply tap it! Booki goes beyond standard dictionary definitions by instantly explaining the word in the exact context of the sentence you are reading. You'll understand the nuance of the word immediately without ever losing your place in the story. AI-Generated Vocabulary Quizzes Turn your reading into active learning. Booki automatically remembers every word you look up and generates custom, interactive multiple-choice quizzes to test your memory. You'll only be tested on the exact words you struggled with, ensuring you master them for good. Interactive AI Companion Meet Booki, your friendly, animated reading buddy. Booki floats alongside you as you read, offering encouragement, insights, and instant answers to any questions you have about the book or its characters through a built-in AI chat. Native Audio Pronunciation Listen and learn. Booki features high-quality text-to-speech pronunciation for your vocabulary words, ensuring you master the correct intonation and spelling as you study. Curated Classic Library Dive into a beautiful, distraction-free library of timeless classics, carefully formatted with elegant typography for optimal reading and concentration. Rediscover the magic of classic literature while effortlessly expanding your English skills. Download Read with Booki today and turn your next great book into your best teacher! Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://florithm.com/privacy-read-with-booki.html

Screenshots

Casty4 screens
Read with Booki4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard4 real differences · 5 level
Casty versus Read with Booki: the parameters behind the verdict, then further details
ParameterCastyRead with Booki
PriceFreeFree
Rating5.0 (1 ratings)5.0 (1 ratings)
Number of ratings11
Update frequencyEvery 2 daysDaily — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.113.0 — better
Further details — not scored
Size23 MB124 MB
Age rating4+4+
DeveloperWai Yip LiFlorithm LLC

Customer experience

Casty

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Read with Booki

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Casty

No in-app purchases

2 purchases

Read with Booki

Subscriptions2
  • Booki Premium$0.991 Month
  • Booki Premium3 Days trial$9.991 Year

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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