Comparison

BookLight vs Readem All

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

Head to head
About

BookLight

This app helps language learners build vocabulary by translating words with a single tap while reading EPUB, PDF, or TXT files. It automatically saves new words and uses spaced repetition flashcards to aid memorization, eliminating the need for manual flashcard creation or app switching.

Highlights
  • Tap to translate words instantly
  • Automatic vocabulary saving
  • Spaced-repetition flashcards
  • Import EPUB, PDF, TXT files
  • Offline reading support
  • Customizable reading themes and fonts
  • Pronunciation audio
Features
Read full description

Reading a book in another language? Stop breaking your flow to look words up. BookLight translates any word with a single tap — and remembers it for you. BookLight is a EPUB & PDF & Txt reader built for language learners. Tap a word for an instant translation, and it's saved to your vocabulary automatically. Then spaced-repetition flashcards bring it back right before you'd forget — so every reading session actually builds your vocabulary. No app-switching. No flashcards to make by hand. Perfect for language learners, foreign-book readers, and anyone studying for TOEFL or IELTS. Key Features: Start Reading in Seconds — Free Classics Inside - Download from various free classics (Project Gutenberg) right inside the app — no files to find, no setup. - Or import your own DRM-free EPUB & PDF & TXT files from your device. - Read offline anytime, with your reading progress saved and restored automatically. Tap to Translate — Without Losing Context - Tap any word for an instant translation: meaning by part of speech, phonetics, and an example sentence. - Tap an inflected word and see its base form, too. - Hear the pronunciation read aloud with one tap. - Every word you tap is saved automatically — together with the sentence and the book it came from. - Translate into 9 languages: Korean, Spanish, French, Japanese, Chinese, Russian, Hindi, Vietnamese, and Indonesian. Remember Every Word — Spaced Repetition - Your vocabulary list builds itself as you read — no manual entry. - Review with spaced-repetition (SRS) flashcards that resurface each word right before you forget it. - Tap any saved word to jump straight back to the exact spot in the book. - Keep a daily streak and a smart reminder nudges you only when words are actually waiting. Your Book Becomes an Audiobook — AI Read-Aloud - A natural, human-like on-device AI voice reads your book aloud — choose from 10 voices. - The sentence being read is highlighted, so you can follow along with your eyes and ears. - Playback keeps going with the screen off or while you use other apps. - Playback speed from 0.5x to 2x — faster on the commute, slower before sleep. - Speech is synthesized on your device, so it works without an internet connection. Read Your Way, Day or Night - 7 fonts and 25 reading themes — from Sepia and Night to Rose Quartz, Sage, and Midnight. - Adjust font size and line spacing until the page feels just right. - Choose how you read — page turns or continuous scroll. - Read hands-free with auto-scroll — 10 speed levels, and a single touch pauses instantly. - Full dark mode plus automatic system-theme sync. - Side-by-Side two-page display mode for comfortable reading on tablets. Loved by readers in 10+ countries. Supports 9 translation languages and works with any DRM-free EPUB or TXT file. Download BookLight today — and turn every reading session into a vocabulary lesson! - Privacy Policy: https://pearlismylove.github.io/apps/book-light/privacy-policy.html - Terms And Conditions: https://pearlismylove.github.io/apps/book-light/terms-and-conditions.html - Support: https://pearlismylove.github.io/apps/book-light/support.html

About

Readem All

This app combines an e-book reader with a comprehensive offline dictionary, allowing users to look up words instantly while reading. It supports various formats and offers features like search history and spaced repetition reminders for effective language learning.

Highlights
  • Integrated offline English-Korean and English-English dictionaries
  • Supports EPUB, PDF, and TXT e-book formats
  • Instant word lookup while reading
  • Search history and vocabulary export
  • Spaced repetition review reminders
  • Camera scan to TXT for paper books
Features
Read full description

* Tired of interrupting your flow while reading foreign books due to unknown words? * No more switching between apps. Readem All combines a professional e-book viewer with a vast database of English-Native and English-English dictionaries, helping you read and learn efficiently. * Challenge yourself to improve your English with Readem All, the most effective reading tool. * **Powerful E-Book Engine:** Supports standard formats like TXT, EPUB, and PDF, optimized for reading. Access web pages and daily news sites for continuous engagement. * **Comprehensive Offline Dictionary:** Includes a massive 60,000+ word database. Choose and install the dictionary for your specific language directly within the app. Only essential meanings are provided for quick and easy memorization. * **Fully Offline:** No data or Wi-Fi needed to look up words instantly. * **Smart Learning:** Manage your search history, review words, and export your word list for PC or other app use. Includes review notifications based on the Ebbinghaus Forgetting Curve. * **RSS News and webpage reading: Webpages or RSS news can be read with dictionary search. * **Book scan: You can scan paper books and read with dictionary.

Screenshots

BookLight4 screens
Readem All4 screens

Verdict

The call

The clearest difference is in-app purchases: Readem All at none against BookLight's 3. BookLight's advantage is ads (none vs shown) and iOS requirement (16.4 vs 26.4). On price, update cadence 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. BookLight sells 3 in-app purchases, starting at $0.99 per month. Readem All asks for nothing beyond the download.

UpkeepUpdate frequency

BookLight ships an update every 5 days, Readem All every 3 days. The most recent releases landed on October 24, 2026 and October 8, 2026 respectively.

Scorecard4 real differences · 6 level
BookLight versus Readem All: the parameters behind the verdict, then further details
ParameterBookLightReadem All
PriceFreeFree
Rating—5.0 (1 ratings) — better
Positive reviews100.0% of reviews—
Number of ratings—1 — better
Update frequencyEvery 5 daysEvery 3 days — better
AdsNo — betterYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesAd-supported — better
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.4 — better26.4
Further details — not scored
Size94 MB29 MB
Age rating4+17+
DeveloperJungjun LeeJONG AN KIM

Customer experience

BookLight

Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Readem All

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

In-app purchases

3 purchases

BookLight

Subscriptions2
  • Monthly Plan$0.991 Month
  • Yearly Plan7 Days trial$7.991 Year
One-time1
  • Lifetime Plan$9.99
None

Readem All

No in-app purchases

Questions

Is BookLight free?
BookLight is free to download, with in-app purchases available.
Is Readem All free?
Readem All is free to download, with no in-app purchases.
Do BookLight or Readem All have ads?
Readem All shows ads; BookLight does not.
Which is updated more often, BookLight or Readem All?
BookLight ships an update every 5 days, and Readem All every 3 days. Most recently, BookLight was updated on October 24, 2026 and Readem All on October 8, 2026.

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