# PDF vs QR Studio Toolkit

The clearest difference is ads: QR Studio Toolkit at none against PDF's shown. QR Studio Toolkit also leads on update cadence (every 2 days vs every 5 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

PDF ships an update every 5 months, QR Studio Toolkit every 2 days. The most recent releases landed on November 3, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | PDF | QR Studio Toolkit |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.5 (6 ratings)](https://appshunter.io/ios/app/pdf-lock-and-unlock/id6444889806/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 5 months | **Every 2 days** |
| Monetization | Free with in-app purchases | — |
| Size | 35 MB | 17 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Hardik Dhameliya](https://appshunter.io/developer/1611140120) | [ASAPP STUDIO](https://appshunter.io/developer/1338092352) |

## What reviewers say

### PDF

[App page](https://appshunter.io/ios/app/pdf-lock-and-unlock/id6444889806)

Secure your documents by adding password protection or remove existing passwords from PDF files. This app also offers tools to merge, extract, and convert PDFs, along with OCR capabilities to recognize text.

**Highlights:** Lock PDF with password, Unlock password-protected PDFs, Merge multiple PDF files, Extract or remove PDF pages, Add watermarks to PDFs, Scan and recognize text (OCR), Digitally sign PDFs, Convert web pages to PDF

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Subscription Weekly | $4.99 | per 7 days |
| Subscription Monthly | $9.99 | per month |
| Subscription Yearly | $19.99 | per year |


### QR Studio Toolkit

[App page](https://appshunter.io/ios/app/qr-studio-toolkit/id6757149704)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| QR Studio Toolkit Premium | $0.99 | one-time |


## Frequently asked questions

### Is PDF free?

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

### Is QR Studio Toolkit free?

QR Studio Toolkit is free to download, with in-app purchases available.

### Do PDF or QR Studio Toolkit have ads?

PDF shows ads; QR Studio Toolkit does not.

### Which is updated more often, PDF or QR Studio Toolkit?

PDF ships an update every 5 months, and QR Studio Toolkit every 2 days. Most recently, PDF was updated on November 3, 2026 and QR Studio Toolkit on November 9, 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.*