# PDF Scanner・Document Scanner・ vs unlock pdf & lock pdf

The clearest difference is review sentiment: PDF Scanner・Document Scanner・ at 68% against unlock pdf & lock pdf's 35%. PDF Scanner・Document Scanner・ also leads on update cadence (fortnightly vs every 4 months) and rating (4.5 vs 4.2). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. PDF Scanner・Document Scanner・ sells 4 in-app purchases, starting at $2.99 per 7 days and unlock pdf & lock pdf sells 2 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

PDF Scanner・Document Scanner・ holds the better App Store score, 4.5 against 4.2. That said, the two scores are not equally well evidenced: PDF Scanner・Document Scanner・ has 2.1K ratings behind it against 54, so its average is the more settled of the two. Written reviews point the same way: 68% of PDF Scanner・Document Scanner・'s written reviews are positive against 35% of unlock pdf & lock pdf's.

PDF Scanner・Document Scanner・ ships an update fortnightly, unlock pdf & lock pdf every 4 months. The most recent releases landed on October 23, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | PDF Scanner・Document Scanner・ | unlock pdf & lock pdf |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (2.1K ratings)](https://appshunter.io/ios/app/pdf-scannerdocument-scanner/id1469182761/reviews)** | [4.2 (54 ratings)](https://appshunter.io/ios/app/unlock-pdf-and-lock-pdf/id1623109999/reviews) |
| Number of ratings | **2.1K** | 54 |
| Positive reviews | **67.5% of reviews** | 35.3% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | **Fortnightly** | Every 4 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 113 MB | 7 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Protools LLP](https://appshunter.io/developer/1460361693) | [Sounak Sarkar](https://appshunter.io/developer/938584928) |

## What reviewers say

### PDF Scanner・Document Scanner・

[App page](https://appshunter.io/ios/app/pdf-scannerdocument-scanner/id1469182761)

Transform your device into a powerful mobile scanner. Easily capture, edit, and share documents, IDs, and receipts as PDFs or JPEGs. Add signatures and annotations for professional document handling.

**Highlights:** Scan documents to PDF or JPEG, Add and import signatures, Annotate and edit scanned documents, Organize scans into folders, Share via iMessage, email, or cloud services, Automatic border detection, Multipage scanning

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Scan Documents & PDF Files - Pro | $2.99 | per 7 days |
| Quick Scan Documents & PDF - Pro | $9.99 | per month |
| Scan to PDF & Docs – Yearly Pro | $19.99 | per year |
| Smart PDF Scanner & Document Reader | $19.99 | per year |


### unlock pdf & lock pdf

[App page](https://appshunter.io/ios/app/unlock-pdf-and-lock-pdf/id1623109999)

Protect sensitive PDF files by adding password encryption. Effortlessly remove existing passwords from PDFs for easier access. Change PDF passwords and secure your documents with peace of mind. This app helps manage PDF security and accessibility.

**Highlights:** Add password to PDF, Remove password from PDF, Change PDF password, Password encryption, Free with ads, Premium subscription

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $0.99 | per month |
| Premium Yearly | $5.99 | per year |


## Frequently asked questions

### Is PDF Scanner・Document Scanner・ free?

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

### Is unlock pdf & lock pdf free?

unlock pdf & lock pdf is free to download, with in-app purchases available.

### Which has better reviews, PDF Scanner・Document Scanner・ or unlock pdf & lock pdf?

PDF Scanner・Document Scanner・ is rated higher. PDF Scanner・Document Scanner・ averages 4.5 out of 5 from 2.1K ratings, while unlock pdf & lock pdf averages 4.2 from 54 ratings.

### Do PDF Scanner・Document Scanner・ or unlock pdf & lock pdf have ads?

Both PDF Scanner・Document Scanner・ and unlock pdf & lock pdf show ads.

### Which is updated more often, PDF Scanner・Document Scanner・ or unlock pdf & lock pdf?

PDF Scanner・Document Scanner・ ships an update fortnightly, and unlock pdf & lock pdf every 4 months. Most recently, PDF Scanner・Document Scanner・ was updated on October 23, 2026 and unlock pdf & lock pdf on October 18, 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.*