# PDF Converter vs UnitKeeper

The clearest difference is update cadence: PDF Converter at fortnightly against UnitKeeper's every 2 months. PDF Converter also leads on iOS requirement (17.0 vs 26.2). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. PDF Converter sells 3 in-app purchases, starting at $4.99 per 7 days and UnitKeeper sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

PDF Converter ships an update fortnightly, UnitKeeper every 2 months. The most recent releases landed on September 17, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | PDF Converter | UnitKeeper |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (35 ratings)](https://appshunter.io/ios/app/pdf-converter-pdf-scanner/id6740842369/reviews)** | — |
| Number of ratings | **35** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 2 months |
| Monetization | Free with in-app purchases | — |
| Size | 29 MB | 5 MB |
| Requires iOS | **17.0** | 26.2 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | +4 | 4+ |
| Developer | [Syed Sahib Sultan](https://appshunter.io/developer/1772841767) | [NATHANIEL J MOREHOUSE](https://appshunter.io/developer/1889388056) |

## What reviewers say

### PDF Converter

[App page](https://appshunter.io/ios/app/pdf-converter-pdf-scanner/id6740842369)

Easily transform images and physical documents into high-quality PDFs. Convert photos, JPGs, and other image files, or scan documents using your device's camera. Create and customize PDFs for various needs with a secure and efficient interface.

**Highlights:** Scan physical documents with camera, Convert photos and JPGs to PDF, Create and customize PDFs, File conversion to PDF, Automatic edge detection and image correction

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Scan & Convert Files into PDF | $4.99 | per 7 days |
| Scan & Convert Files into PDF | $9.99 | per month |
| Scan & Convert Files into PDF | $34.99 | per year |


### UnitKeeper

[App page](https://appshunter.io/ios/app/unitkeeper/id6761486538)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ProUnlock | $6.99 | one-time |


## Frequently asked questions

### Is PDF Converter free?

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

### Is UnitKeeper free?

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

### Do PDF Converter or UnitKeeper have ads?

Neither PDF Converter nor UnitKeeper shows ads.

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

PDF Converter ships an update fortnightly, and UnitKeeper every 2 months. Most recently, PDF Converter was updated on September 17, 2026 and UnitKeeper on September 10, 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.*