# BookLight vs Readem All

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.

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.

BookLight ships an update every 4 days, Readem All every 3 days. The most recent releases landed on October 28, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | BookLight | Readem All |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/readem-all/id6783239174/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 4 days | **Every 3 days** |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 94 MB | 29 MB |
| Requires iOS | **16.4** | 26.4 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Jungjun Lee](https://appshunter.io/developer/1485806455) | [JONG AN KIM](https://appshunter.io/developer/6783239176) |

## What reviewers say

### BookLight

[App page](https://appshunter.io/ios/app/booklight-epub-translator/id6759386987)

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:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Plan | $0.99 | per month |
| Yearly Plan | $7.99 | per year |
| Lifetime Plan | $9.99 | one-time |


### Readem All

[App page](https://appshunter.io/ios/app/readem-all/id6783239174)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked 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 4 days, and Readem All every 3 days. Most recently, BookLight was updated on October 28, 2026 and Readem All on October 8, 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.*