Comparison

PDF Book Read vs ClaviSay

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

Head to head
About

PDF Book Read

Features
Read full description

Reading documents in a foreign language doesn't have to be hard. VocabPDF is the ultimate PDF reader designed specifically for language learners, students, and professionals. Stop switching between your document and a dictionary app. With VocabPDF, you can read any PDF, tap on unknown words to translate them instantly, and save them to your personal vocabulary list with a single tap. KEY FEATURES: • Smart PDF Reader: Smooth, fast, and optimized for reading text-heavy documents. • One-Tap Translation: Instantly translate words to your device's native language. • Highlight & Save: Mark important words with beautiful neon colors and save them with their context sentences. • Spaced Repetition System (SRS): Review your saved words effectively and move them to your long-term memory. • Text-to-Speech: Listen to the correct pronunciation of any word. VOCABPDF PREMIUM: Upgrade to Premium to unlock the full potential of your learning! • Unlimited Word Saves: Break the 50-word limit and build an endless vocabulary library. • Unlimited SRS Reviews: Master as many words as you want, anytime. Whether you are studying for exams like TOEIC, TOEFL, or IELTS, reading academic papers, or just enjoying a foreign book, VocabPDF is your perfect reading companion. Download now and start building your vocabulary today! Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

ClaviSay

Improve your English by reading real-world content and practicing with a personalized AI agent. Save new words and phrases, then engage in focused AI-powered exercises based on your learning history. Receive AI feedback to enhance your own English expressions.

Highlights
  • Read English articles with AI assistance
  • Save vocabulary and expressions
  • Personalized AI practice sessions
  • AI feedback on English expressions
  • Review mistakes and learning items
  • Build a personal learning memory
Features
Read full description

Learn English from real content. Save words, phrases, and sentences from what you read. Turn them into personalized AI Practice with your own learning agent. ClaviSay helps you improve English through real-world reading, vocabulary review, and short AI-powered practice sessions. Instead of studying from generic lessons, you can practice with the English content you actually read. Import or read articles, save useful expressions, and let your AI agent create focused exercises from your learning history. Key features: - Read English articles with AI assistance - Understand words, phrases, and sentences in context - Save vocabulary, expressions, and useful sentences - Practice vocabulary recall and phrase usage - Improve your own English expressions with AI feedback - Review mistakes and save learning items - Build a personal learning memory with your AI agent ClaviSay is designed for learners who want to improve English through real reading, daily practice, and practical expression. AI-generated explanations and feedback are provided for language learning support and may not always be perfect.

Screenshots

PDF Book Read4 screens
ClaviSay4 screens

Verdict

The call

The clearest difference is in-app purchases: ClaviSay at none against PDF Book Read's 2. ClaviSay also leads on iOS requirement (13.0 vs 26.2). On price, update cadence, ads and device support 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. PDF Book Read sells 2 in-app purchases, starting at $1.99 per year. ClaviSay asks for nothing beyond the download.

UpkeepUpdate frequency

PDF Book Read ships an update every 2 weeks, ClaviSay weekly. The most recent releases landed on October 2, 2026 and October 5, 2026 respectively.

Scorecard2 real differences · 8 level
PDF Book Read versus ClaviSay: the parameters behind the verdict, then further details
ParameterPDF Book ReadClaviSay
PriceFreeFree
Rating—5.0 (1 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—1 — better
Update frequencyEvery 2 weeksWeekly — better
AdsNoNo
In-app purchasesYesNo — better
Monetization—Free
DevicesiPhone, iPadiPhone, iPod
Requires iOS26.213.0 — better
Further details — not scored
Size9 MB49 MB
Age rating4+4+
DeveloperYuya Takamoto松 颜

In-app purchases

2 purchases

PDF Book Read

Subscriptions1
  • Annual Premium$1.991 Year
One-time1
  • Lifetime Premium$2.99
None

ClaviSay

No in-app purchases

Questions

Is PDF Book Read free?
PDF Book Read is free to download, with in-app purchases available.
Is ClaviSay free?
ClaviSay is free to download, with no in-app purchases.
Do PDF Book Read or ClaviSay have ads?
Neither PDF Book Read nor ClaviSay shows ads.
Which is updated more often, PDF Book Read or ClaviSay?
PDF Book Read ships an update every 2 weeks, and ClaviSay weekly. Most recently, PDF Book Read was updated on October 2, 2026 and ClaviSay on October 5, 2026.

Other comparisons