# PDF Crisp View vs K

The clearest difference is in-app purchases: PDF Crisp View at none against K's 1. K's advantage is update cadence (weekly vs monthly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. K sells 1 in-app purchase, starting at $1.99 per year. PDF Crisp View asks for nothing beyond the download.

PDF Crisp View ships an update monthly, K weekly. The most recent releases landed on September 8, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | PDF Crisp View | K |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Weekly** |
| Size | 74 MB | 19 MB |
| Requires iOS | **15.6** | 16.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Running River Network Technology Limited](https://appshunter.io/developer/1804246053) | [Kitta Co.](https://appshunter.io/developer/1896674871) |

## What reviewers say

### PDF Crisp View

[App page](https://appshunter.io/ios/app/pdf-crisp-view-scannermaker/id6754379195)

**Features:** macOS Compatibility

**In-app purchases:** none


### K

[App page](https://appshunter.io/ios/app/k-card-reader/id6770570934)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Mode | $1.99 | per year |


## Frequently asked questions

### Is PDF Crisp View free?

PDF Crisp View is free to download, with no in-app purchases.

### Is K free?

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

### Do PDF Crisp View or K have ads?

Neither PDF Crisp View nor K shows ads.

### Which is updated more often, PDF Crisp View or K?

PDF Crisp View ships an update monthly, and K weekly. Most recently, PDF Crisp View was updated on September 8, 2026 and K on September 23, 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.*