# 4000+ World General Knowledge vs Lex Reader

The clearest difference is review sentiment: Lex Reader at 100% against 4000+ World General Knowledge's 3%. Lex Reader also leads on update cadence (weekly vs every 3 months). 4000+ World General Knowledge's advantage is iOS requirement (12.0 vs 15.0). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. 4000+ World General Knowledge sells 1 one-off in-app purchase and Lex Reader sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

4000+ World General Knowledge ships an update every 3 months, Lex Reader weekly. The most recent releases landed on October 8, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | 4000+ World General Knowledge | Lex Reader |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.9 (12 ratings)](https://appshunter.io/ios/app/lex-reader/id6757875402/reviews)** |
| Number of ratings | — | **12** |
| Positive reviews | 2.9% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Weekly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 22 MB | 3 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Mo Moin](https://appshunter.io/developer/913492840) | [LexBooks, Inc.](https://appshunter.io/developer/1869433764) |

## What reviewers say

### 4000+ World General Knowledge

[App page](https://appshunter.io/ios/app/4000-plus-world-general-knowledge/id1053795099)

Access over 4000 general knowledge questions and answers across diverse categories to prepare for competitive exams. Stay updated with current affairs and reinforce your learning with study reminders and note-taking features.

**Highlights:** Over 4000 GK questions and answers, Current affairs updates, Diverse topic categories, Study reminder functionality, Notes creator, Competitive exam preparation

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $4.99 | one-time |


### Lex Reader

[App page](https://appshunter.io/ios/app/lex-reader/id6757875402)

This app offers a versatile reading experience for books and audiobooks with customizable modes, extensive library access, and social features. It allows users to import their own content, sync progress across devices, and discover new reads through personalized recommendations and curated shelves.

**Highlights:** Customizable reading modes (scroll, paginated, blitz, bilingual), EPUB, PDF, and MP3 reader/player, Text-to-audio synchronization, Ambient audiobook listening with custom sounds, Extensive library search and personalized recommendations, Import reading data from Goodreads/Storygraph, Create and share custom book shelves, Sync reading progress across devices

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lex Premium | $4.99 | per month |
| Lex Premium | $39.99 | per year |


## Frequently asked questions

### Is 4000+ World General Knowledge free?

4000+ World General Knowledge is free to download, with in-app purchases available.

### Is Lex Reader free?

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

### Do 4000+ World General Knowledge or Lex Reader have ads?

Neither 4000+ World General Knowledge nor Lex Reader shows ads.

### Which is updated more often, 4000+ World General Knowledge or Lex Reader?

4000+ World General Knowledge ships an update every 3 months, and Lex Reader weekly. Most recently, 4000+ World General Knowledge was updated on October 8, 2026 and Lex Reader on October 7, 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.*