# SMK53 vs PDF Converter

The clearest difference is in-app purchases: SMK53 at none against PDF Converter's 2. PDF Converter's advantage is update cadence (weekly vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. PDF Converter sells 2 in-app purchases, starting at $4.99 per 7 days. SMK53 asks for nothing beyond the download.

SMK53 ships an update every 2 months, PDF Converter weekly. Both last shipped on October 30, 2026.

## The numbers

| Metric | SMK53 | PDF Converter |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Size | 4 MB | 9 MB |
| Requires iOS | 16.0 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Husain Musaji](https://appshunter.io/developer/1654721258) | [添 邱](https://appshunter.io/developer/1819535113) |

## What reviewers say

### SMK53

[App page](https://appshunter.io/ios/app/smk53/id6448306246)

**Features:** macOS Compatibility

**In-app purchases:** none


### PDF Converter

[App page](https://appshunter.io/ios/app/pdf-converter-file-conversion/id6751520980)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PDF Converter Weekly | $4.99 | per 7 days |
| PDF Converter Annual | $29.99 | per year |


## Frequently asked questions

### Is SMK53 free?

SMK53 is free to download, with no in-app purchases.

### Is PDF Converter free?

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

### Do SMK53 or PDF Converter have ads?

Neither SMK53 nor PDF Converter shows ads.

### Which is updated more often, SMK53 or PDF Converter?

SMK53 ships an update every 2 months, and PDF Converter weekly. Most recently, SMK53 was updated on October 30, 2026 and PDF Converter on October 30, 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.*