# 3lines.org vs Library Merger

The clearest difference is update cadence: 3lines.org at every 4 days against Library Merger's every 2 months. 3lines.org also leads on iOS requirement (9.0 vs 14.0). On price, rating, review sentiment and ratings volume there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 4.6 for 3lines.org against 4.6 for Library Merger. Both are backed by a comparable volume of ratings — 66 and 38 respectively. Written reviews are what separate them: 85% of 3lines.org's written reviews are positive against 81% of Library Merger's.

3lines.org ships an update every 4 days, Library Merger every 2 months. The most recent releases landed on September 22, 2026 and July 17, 2026 respectively.

## The numbers

| Metric | 3lines.org | Library Merger |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (66 ratings)](https://appshunter.io/ios/app/3linesorg/id1352194221/reviews) | [4.6 (38 ratings)](https://appshunter.io/ios/app/library-merger/id1539780103/reviews) |
| Number of ratings | **66** | 38 |
| Positive reviews | **84.8% of reviews** | 81.4% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 2 months |
| Monetization | Free | Free |
| Size | 66 MB | 13 MB |
| Requires iOS | **9.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jon Hargett](https://appshunter.io/developer/1087189196) | [Andreas Skorczyk](https://appshunter.io/developer/1539780105) |

## What reviewers say

### 3lines.org

[App page](https://appshunter.io/ios/app/3linesorg/id1352194221)

Convert Chinese ePub files and web pages into a three-line format, adding romanization and translation. The converted documents can be saved as PDFs or copied for further use.

**Highlights:** ePub to three-line conversion, Add romanization (pinyin, Sidney Lau, Yale), Add native language translation (English, Spanish), Convert to PDF, Paste Chinese text, Import from URL

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

**In-app purchases:** none


### Library Merger

[App page](https://appshunter.io/ios/app/library-merger/id1539780103)

Easily combine two JW Library backups into a single, unified version. Resolve conflicts by choosing which content to keep, ensuring your study materials are consistent across all your devices. This utility streamlines library management for users of JW Library.

**Highlights:** Combine two JW Library backups, Resolve content conflicts, Restore merged backup to devices, Open backups via AirDrop, Open-source code

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

**In-app purchases:** none


## Frequently asked questions

### Is 3lines.org free?

3lines.org is free to download, with no in-app purchases.

### Is Library Merger free?

Library Merger is free to download, with no in-app purchases.

### Which has better reviews, 3lines.org or Library Merger?

3lines.org and Library Merger are both rated 4.6 out of 5 on the App Store, from 66 and 38 ratings respectively.

### Do 3lines.org or Library Merger have ads?

Neither 3lines.org nor Library Merger shows ads.

### Which is updated more often, 3lines.org or Library Merger?

3lines.org ships an update every 4 days, and Library Merger every 2 months. Most recently, 3lines.org was updated on September 22, 2026 and Library Merger on July 17, 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.*