# HK Service vs PDF Scanner & Simple Reader

The clearest difference is in-app purchases: HK Service at none against PDF Scanner & Simple Reader's 2. HK Service also leads on update cadence (every 3 days vs weekly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. PDF Scanner & Simple Reader sells 2 in-app purchases, starting at $0.99 per month. HK Service asks for nothing beyond the download.

HK Service ships an update every 3 days, PDF Scanner & Simple Reader weekly. The most recent releases landed on October 19, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | HK Service | PDF Scanner & Simple Reader |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Weekly |
| Monetization | — | Free with in-app purchases |
| Size | 3 MB | 64 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [HK Global](https://appshunter.io/developer/1746674367) | [KunWoo Kwon](https://appshunter.io/developer/1603506815) |

## What reviewers say

### HK Service

[App page](https://appshunter.io/ios/app/hk-service/id6503035863)

**Features:** macOS Compatibility

**In-app purchases:** none


### PDF Scanner & Simple Reader

[App page](https://appshunter.io/ios/app/pdf-scanner-and-simple-reader/id6753705461)

Transform paper documents into searchable PDFs using your device's camera. Read, bookmark, and organize your scanned files offline with a simple, intuitive interface. Offers tools for page extraction and merging for efficient document management.

**Highlights:** Document scanning to PDF, Simple PDF reader with zoom, Continue reading from last page, Bookmark important pages, Offline PDF access, Extract and merge PDF pages

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| remove ads (one month) | $0.99 | per month |
| remove ads (life time) | $4.99 | one-time |


## Frequently asked questions

### Is HK Service free?

HK Service is free to download, with no in-app purchases.

### Is PDF Scanner & Simple Reader free?

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

### Do HK Service or PDF Scanner & Simple Reader have ads?

Neither HK Service nor PDF Scanner & Simple Reader shows ads.

### Which is updated more often, HK Service or PDF Scanner & Simple Reader?

HK Service ships an update every 3 days, and PDF Scanner & Simple Reader weekly. Most recently, HK Service was updated on October 19, 2026 and PDF Scanner & Simple Reader on October 14, 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.*