# Polylingo vs BookLight

The clearest difference is iOS requirement: Polylingo at 13.0 against BookLight's 16.4. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Polylingo sells 3 in-app purchases, starting at $5.99 per 7 days and BookLight sells 3 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

Polylingo ships an update every 6 days, BookLight every 5 days. The most recent releases landed on September 29, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Polylingo | BookLight |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (4 ratings)](https://appshunter.io/ios/app/polylingo-language-reader/id6758527666/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 days | **Every 5 days** |
| Monetization | Freemium | Free with in-app purchases |
| Size | 128 MB | 94 MB |
| Requires iOS | **13.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 9+ | 4+ |
| Developer | [Jesse Deng](https://appshunter.io/developer/1584491248) | [Jungjun Lee](https://appshunter.io/developer/1485806455) |

## What reviewers say

### Polylingo

[App page](https://appshunter.io/ios/app/polylingo-language-reader/id6758527666)

Enhance language learning through reading with instant translations, synchronized audio narration, and AI-generated stories. Save new vocabulary and import your own content to practice reading in a foreign language.

**Highlights:** Instant tap-to-translate, Audio narration with word highlighting, AI-powered story generation, Personal phrase book, Import EPUB, PDF, and text files, 10 supported languages, Customizable reading themes

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Pro Subscription | $5.99 | per 7 days |
| Monthly Pro | $14.99 | per month |
| Yearly Pro Subscription | $39.99 | per year |


### 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 |


## Frequently asked questions

### Is Polylingo free?

Polylingo is free to download, with in-app purchases available.

### Is BookLight free?

BookLight is free to download, with in-app purchases available.

### Do Polylingo or BookLight have ads?

Neither Polylingo nor BookLight shows ads.

### Which is updated more often, Polylingo or BookLight?

Polylingo ships an update every 6 days, and BookLight every 5 days. Most recently, Polylingo was updated on September 29, 2026 and BookLight on October 5, 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.*