# Document Scanner vs PDF Guru：Sign & Watermark

The clearest difference is ads: PDF Guru：Sign & Watermark at none against Document Scanner's shown. PDF Guru：Sign & Watermark also leads on update cadence (monthly vs every 4 months). Document Scanner's advantage is device support (3 vs 1). On price, rating, ratings volume and in-app purchases there is nothing between them.

Both are free to download. Document Scanner sells 2 in-app purchases, starting at $9.99 per month and PDF Guru：Sign & Watermark sells 4 in-app purchases, starting at $9.99 per 7 days. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 5.0 for Document Scanner against 5.0 for PDF Guru：Sign & Watermark. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Document Scanner ships an update every 4 months, PDF Guru：Sign & Watermark monthly. The most recent releases landed on October 23, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Document Scanner | PDF Guru：Sign & Watermark |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/document-scanner-pdf-scan-app/id6743620504/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/pdf-gurusign-and-watermark/id6800982594/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Monthly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 76 MB | 202 MB |
| Requires iOS | **15.6** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Nguyen Thuy Linh](https://appshunter.io/developer/1803081322) | [Sharpmobi ltd](https://appshunter.io/developer/1671981018) |

## What reviewers say

### Document Scanner

[App page](https://appshunter.io/ios/app/document-scanner-pdf-scan-app/id6743620504)

Easily digitize and manage your documents with this app. Scan, edit, extract text using OCR, and add electronic signatures to various documents like IDs, invoices, and receipts. Save and share your files as PDFs quickly.

**Highlights:** Scan documents and ID cards, Edit scanned documents, Add electronic signatures, Extract text with OCR, Save and share as PDF

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly - Document scan | $9.99 | per month |
| Yearly - Document scan | $45.49 | per year |


### PDF Guru：Sign & Watermark

[App page](https://appshunter.io/ios/app/pdf-gurusign-and-watermark/id6800982594)

Easily scan, edit, and organize PDF documents. Add custom watermarks, logos, and signatures to professionalize your files. Convert various formats to PDF and manage your documents efficiently.

**Highlights:** AI-powered PDF scanning, Custom text and logo watermarks, Electronic signatures and annotations, PDF merging, splitting, and compression, OCR text recognition, File conversion to PDF, Document organization and search

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock All Features | $9.99 | per 7 days |
| Unlock All Features | $9.99 | per 7 days |
| Unlock All Features | $9.99 | per 7 days |
| Unlock All Features | $59.99 | per year |


## Frequently asked questions

### Is Document Scanner free?

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

### Is PDF Guru：Sign & Watermark free?

PDF Guru：Sign & Watermark is free to download, with in-app purchases available.

### Which has better reviews, Document Scanner or PDF Guru：Sign & Watermark?

Document Scanner and PDF Guru：Sign & Watermark are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do Document Scanner or PDF Guru：Sign & Watermark have ads?

Document Scanner shows ads; PDF Guru：Sign & Watermark does not.

### Which is updated more often, Document Scanner or PDF Guru：Sign & Watermark?

Document Scanner ships an update every 4 months, and PDF Guru：Sign & Watermark monthly. Most recently, Document Scanner was updated on October 23, 2026 and PDF Guru：Sign & Watermark on October 29, 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.*