PDF Book Read vs Knowra
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
PDF Book Read
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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: โข Smart PDF Reader: Smooth, fast, and optimized for reading text-heavy documents. โข One-Tap Translation: Instantly translate words to your device's native language. โข Highlight & Save: Mark important words with beautiful neon colors and save them with their context sentences. โข Spaced Repetition System (SRS): Review your saved words effectively and move them to your long-term memory. โข Text-to-Speech: Listen to the correct pronunciation of any word. VOCABPDF PREMIUM: Upgrade to Premium to unlock the full potential of your learning! โข Unlimited Word Saves: Break the 50-word limit and build an endless vocabulary library. โข 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/
Knowra
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Knowra helps you build English listening fluency through short, repeatable audio sessions that fit into quiet moments of your day. Open the app, play today's session, read the transcript when you need context, and loop difficult lines until they feel natural. Knowra is designed for learners who want steady exposure without long lessons or complicated course dashboards. What you can do: - Listen to bite-sized English sessions - Read bilingual transcripts before or while listening - Review key vocabulary, IPA, and meaning in context - Loop difficult lines until pronunciation and rhythm stick - Rate each session so review adapts to your confidence - Import text, audio, podcast episodes, or real-world English for practice - Track streaks, weekly progress, and listening consistency - Use optional reminders, widgets, and Live Activities to stay on rhythm Knowra is built for commuters, busy professionals, and self-study learners who want practical listening practice every day. Start a short session, repeat what matters, and let English become familiar through exposure. Legal: - Privacy Policy: https://knowra.tuanle.dev/privacy - Terms of Service: https://knowra.tuanle.dev/terms - Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: Knowra at none against PDF Book Read's 2. On price, ads, device support and iOS requirement there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. PDF Book Read sells 2 in-app purchases, starting at $1.99 per year. Knowra asks for nothing beyond the download.
| Parameter | PDF Book Read | Knowra |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 weeks | โ |
| Ads | No | No |
| In-app purchases | Yes | No โ better |
| Devices | iPhone, iPad โ better | iPhone |
| Requires iOS | 26.2 | 26.0 โ better |
| Further details โ not scored | ||
| Size | 9 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | Yuya Takamoto | LE ANH TUAN |
In-app purchases
PDF Book Read
- Annual Premium$1.991 Year
- Lifetime Premium$2.99
Knowra
No in-app purchases









