# PDF Reader vs 韩语随时随地学

The clearest difference is update cadence: PDF Reader at every 3 weeks against 韩语随时随地学's every 2 months. PDF Reader also leads on review sentiment (71% vs 63%). 韩语随时随地学's advantage is iOS requirement (8.0 vs 12.0). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. PDF Reader sells 5 one-off in-app purchases and 韩语随时随地学 sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

PDF Reader ships an update every 3 weeks, 韩语随时随地学 every 2 months. The most recent releases landed on September 25, 2026 and September 7, 2026 respectively.

## The numbers

| Metric | PDF Reader | 韩语随时随地学 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (8 ratings)](https://appshunter.io/ios/app/pdf-reader-mini-version/id898564035/reviews)** | — |
| Number of ratings | **8** | — |
| Positive reviews | **71.4% of reviews** | 62.5% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 50 MB | 47 MB |
| Requires iOS | 12.0 | **8.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [绪强 任](https://appshunter.io/developer/898564038) | [北京触阅信息科技有限公司](https://appshunter.io/developer/1420329654) |

## What reviewers say

### PDF Reader

[App page](https://appshunter.io/ios/app/pdf-reader-mini-version/id898564035)

This app allows you to read various document formats like PDF, EPUB, and CHM on your iPhone and iPad. It supports file import, text search, annotation, and even previewing MS Office files and videos. A simple to-do list and auto-save reading progress are also included.

**Highlights:** Reads PDF, CHM, EPUB, TXT files, PDF annotation and text search, File import via Files, Airdrop, iTunes, web, MS Office and video file preview, Simple To-Do list functionality, Auto-save reading progress

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Reader App donate | $0.99 | one-time |
| Dropbox Support | $0.99 | one-time |
| Remove Ad | $4.99 | one-time |
| Todo donate | $7.99 | one-time |
| Todo donate | $14.99 | one-time |


### 韩语随时随地学

[App page](https://appshunter.io/ios/app/id1106272667)

This app offers an official audio-enabled digital version of a popular Korean language learning book series. It features pronunciation guides, realistic scenarios, and interactive learning to help users speak Korean fluently. The app includes four books covering vocabulary, travel phrases, grammar, and beginner lessons.

**Highlights:** Official book content, Audio pronunciation, Interactive learning, Realistic language scenarios, Vocabulary, grammar, and travel guides, Offline access

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 随时随地学韩语 | $5.99 | one-time |


## Frequently asked questions

### Is PDF Reader free?

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

### Is 韩语随时随地学 free?

韩语随时随地学 is free to download, with in-app purchases available.

### Do PDF Reader or 韩语随时随地学 have ads?

Neither PDF Reader nor 韩语随时随地学 shows ads.

### Which is updated more often, PDF Reader or 韩语随时随地学?

PDF Reader ships an update every 3 weeks, and 韩语随时随地学 every 2 months. Most recently, PDF Reader was updated on September 25, 2026 and 韩语随时随地学 on September 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.*