# PDF Pro vs AskRobots Slate

The clearest difference is in-app purchases: AskRobots Slate at none against PDF Pro's 12. AskRobots Slate also leads on rating (5.0 vs 4.7) and iOS requirement (13.0 vs 17.0). PDF Pro's advantage is ratings volume (6.9K vs 1) and device support. On price there is nothing between them.

Both are free to download. PDF Pro sells 12 in-app purchases, starting at $1.99 per month. AskRobots Slate asks for nothing beyond the download.

AskRobots Slate holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: PDF Pro has 6.9K ratings behind it against 1, so its average is the more settled of the two.

## The numbers

| Metric | PDF Pro | AskRobots Slate |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (6.9K ratings)](https://appshunter.io/ios/app/pdf-pro-reader-editor-forms/id454936656/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/askrobots-slate/id6772680364/reviews)** |
| Number of ratings | **6.9K** | 1 |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | — |
| Update frequency | Every 2 months | — |
| Monetization | Subscription | **Free** |
| Size | 97 MB | 14 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | **iPhone, iPad, Mac** | — |
| Age rating | 4+ | 4+ |
| Developer | [Dominic Rodemer](https://appshunter.io/developer/309872333) | [Daniel Quellhorst](https://appshunter.io/developer/1881939007) |

## What reviewers say

### PDF Pro

[App page](https://appshunter.io/ios/app/pdf-pro-reader-editor-forms/id454936656)

Edit, annotate, and read PDF documents on your iPhone and iPad. Highlight text, add notes, shapes, voice recordings, and photos. Search your entire PDF library, fill out forms, and sign documents.

**Highlights:** Edit and annotate PDFs, Highlight text and add notes, Embed audio and photo annotations, Full-text search of PDF library, Fill out and sign PDF forms, Organize PDFs with folders and tags, Import from cloud storage

**Features:** Family Sharing, Vision Pro support

**In-app purchases (12)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Offer - Monthly - macOS | $1.99 | per month |
| Offer - Monthly - iOS | $2.99 | per month |
| Premium - Monthly - iOS | $3.99 | per month |
| Premium - Monthly - macOS | $4.99 | per month |
| Offer - Annual - iOS | $12.99 | per year |
| Offer - Annual - macOS | $22.99 | per year |
| Premium  - Annual - iOS | $24.99 | per year |
| Offer - macOS + iOS | $24.99 | per year |
| Offer - iOS + macOS | $29.99 | per year |
| Premium - Annual - macOS | $44.99 | per year |
| Premium - iOS + macOS | $49.99 | per year |
| Premium - macOS + iOS | $49.99 | per year |

**What reviewers like**

- 👍 User-friendly interface
- 🚀 Fast and efficient
- 💡 Excellent PDF management features
- 🔒 Secure and reliable
- 🎨 Great annotation tools

**What reviewers complain about**

- 🐛 Crashes and stability issues
- 💰 Expensive subscription model
- 🔍 Inconsistent search functionality
- 📖 Loses last read position
- 🖋️ Unreliable handwriting support

**Reported bugs**

- Annotations and highlights randomly disappearing
- Compatibility issues with newer iOS versions
- Corrupted PDF files after editing
- Slow performance on older devices
- Inconsistent behavior when switching between PDFs

**Requested features**

- Improved bookmarking and note-taking
- Seamless iCloud/cloud storage integration
- Customizable keyboard shortcuts
- Advanced text editing and OCR capabilities
- Better organization and folder management


### AskRobots Slate

[App page](https://appshunter.io/ios/app/askrobots-slate/id6772680364)

A straightforward digital drawing surface for capturing quick notes, sketches, lists, and diagrams. Start drawing instantly with touch, stylus, or mouse. Sync your creations across devices via iCloud.

**Highlights:** Instant drawing with finger, stylus, or mouse, Save and open drawings, Start new blank pages, Delete current page, iCloud sync across iPhone and iPad, No account required

**In-app purchases:** none


## Frequently asked questions

### Is PDF Pro free?

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

### Is AskRobots Slate free?

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

### Which has better reviews, PDF Pro or AskRobots Slate?

AskRobots Slate is rated higher. PDF Pro averages 4.7 out of 5 from 6.9K ratings, while AskRobots Slate averages 5.0 from 1 ratings.

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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.*